Every few years, a young actor lands a role big enough to change his career overnight. For Jaalen Best, that role is Cassius Clay — the man the world came to know as Muhammad Ali. Best leads The Greatest, Prime Video’s drama about Ali’s early years, and since the trailer arrived in October 2026, one question has followed him: how old is he?
Jaalen Best is 28 years old. He was born on June 1, 1998, so he turned 28 in June 2026, only months before The Greatest introduces him to a global audience. Interestingly, he is older than the man he plays for most of the series: Clay was 18 when he won Olympic gold and 22 when he first became heavyweight champion.
Here is what we know about Best — his age, early life, first roles, and how he prepared to play one of the most famous athletes ever.
Biography at a Glance
| Detail | Information |
|---|---|
| Full Name | Jaalen Best |
| Date of Birth | June 1, 1998 |
| Age | 28 years old (as of October 2026) |
| Nationality | American |
| Profession | Actor |
| Known For | Playing Cassius Clay / Muhammad Ali in The Greatest |
| Years Active | 2022 – present |
Who Is Jaalen Best?
Jaalen Best is an American actor whose name is about to become far more familiar. Until recently, he was a working television actor with a handful of guest and recurring appearances — a steady, under-the-radar career.
That changed in July 2024, when Prime Video greenlit The Greatest — the first authorized scripted series about Ali’s life, made with his estate’s involvement — and announced Best in the lead role. His widow, Lonnie Ali, is an executive producer; creator and showrunner Ben Watkins (Cross) leads the production, with Michael B. Jordan’s Outlier Society among the companies behind it.
Casting a relative unknown was deliberate. The producers needed someone young enough to play Clay at 18, athletic enough to be believed in the ring, and charismatic enough to fill a personality that dominated every room. Best got the part — and the biggest opportunity of his life.
Jaalen Best’s Age and Birthday
Jaalen Best was born on June 1, 1998. That makes him 28 years old in October 2026, and he will turn 29 on June 1, 2027.
His age shapes the performance at the center of the series. The Greatest covers 1960 to 1964, when Cassius Clay went from Olympic gold medalist in Rome to heavyweight champion of the world. Clay was 18 at those Olympics and 22 when he shocked boxing by beating Sonny Liston in February 1964. Best, at 28, is a few years older — close enough that, with serious physical preparation, he can convincingly cover the arc from teenage prodigy to young champion.
Ali, after all, insisted he was “the greatest” long before the world agreed — and Best must project that same self-belief.
Early Life and Background
Honesty matters here: little about Best’s early life has been confirmed by strong sources, and much of what circulates on small biography sites is unverified. What follows is what can be said with confidence.
Best has roots in North Carolina. A March 2019 report in the Sampson Independent, the local newspaper in Clinton, North Carolina, described him as a graduate of Clinton High School who was then a student at East Carolina University — and already acting. The paper was previewing a community theatre production of Pocahontas, in which Best played Chief Powhatan. Years before television found him, he was performing on a local stage in a small North Carolina town.
Some online profiles add further claims about his upbringing and studies, but those rest on single, low-authority sources and should be treated with caution. The confirmed record tells a clear story: local theatre, a North Carolina university, then professional television work.
Career Beginnings
Best’s screen career began, as most do, with small parts. His earliest credited television appearance came in 2022, in an episode of American Horror Stories, the Hulu anthology spin-off of American Horror Story — a one-episode guest spot, but a first foothold in professional television.
In 2023, he added two more credits: an episode of Magnum P.I., the reboot of the classic detective series, and a recurring role on The CW’s All American: Homecoming, his most substantial work before The Greatest.
None of it made him famous, but it did something more useful: experience across genres — horror anthology, network procedural, sports drama — in front of casting directors. When the search began for a young Muhammad Ali, Best had a small but real body of work behind him.
Ryan Craig in All American: Homecoming
If you have seen Best on screen before The Greatest, it is most likely as Ryan Craig in All American: Homecoming, in three episodes of the show’s second season in 2023.
The series is a sports drama set at a fictional historically Black university, following young athletes balancing ambition, identity, and pressure — a story about talented young people on the edge of breaking through.
Three episodes is not much screen time, but the role mattered. It was his longest-running character — his first chance to develop a part across several episodes instead of arriving and leaving in a single week. And when Prime Video announced his casting as Ali, All American: Homecoming was the credit the entertainment press attached to his name: his calling card, and proof he could hold his own in an ensemble sports drama — the genre he was about to lead at a far bigger scale.
Breakthrough: Playing Muhammad Ali in The Greatest
In July 2024, Prime Video greenlit The Greatest with Best starring as Cassius Clay. The announcement, covered by Deadline and Variety, described the first authorized scripted series about Ali’s life, developed with unprecedented access to his estate.
For Best, it was the leap most actors only dream about: from three-episode guest arcs to the title role in a global streaming series, playing one of the most recognizable people of the twentieth century. Prime Video calls him a “newcomer” — fairly, since this is his first leading role and his most demanding part.
Filming took place in Canada in 2025. In February 2025, Variety reported that Best had signed with M88, the management firm whose clients include Michael B. Jordan, while continuing to be represented by WME — backing that signals big expectations.
Best has described playing Ali as “one of the most humbling, terrifying, exhilarating, inspiring” experiences of his life — an honest summary of what it means to step into those gloves.
What Is The Greatest About?
The Greatest is an eight-episode biographical drama. All eight episodes premiere on Prime Video on November 4, 2026, in more than 240 countries and territories; the official trailer arrived on October 14, 2026.
The first season is a coming-of-age story, opening in 1960 with Clay’s gold medal win at the Rome Olympics and building toward February 1964, when he defeated the fearsome Sonny Liston to become heavyweight champion for the first time. Along the way: the fights that made him a champion, and the family, changing America, and beliefs that transformed him into Muhammad Ali.
Watkins aims to show the man behind the icon, including sides of Ali documentaries have not covered. Reports suggest he has a longer arc in mind, though further seasons are unconfirmed.
The cast underlines the scale: Omari Hardwick as Ali’s father, Cassius “Cash” Clay Sr.; Dana Gourrier as his mother, Odessa “Bird” Clay; Kai Parham as his brother Rudy; Amin Joseph as Sonny Liston; Giovanni Ribisi as trainer Angelo Dundee; and Michael Ealy as Malcolm X.
How Jaalen Best Prepared for the Role
Playing Muhammad Ali is, first of all, a physical problem. Ali’s footwork and hand speed are among the most studied movements in sports history — and Best, remarkably, had never boxed before landing the role.
According to his interview with Esquire, reported widely after the trailer’s release, Best spent eight months training. He ran almost every day to build a boxer’s conditioning, studied footage of Ali’s fights punch by punch — how the champion actually moved, not how actors pretend to box — and listened repeatedly to Ali’s interviews, working on the rhythm and wit that made Ali as famous at a microphone as in the ring.
The endorsement behind the performance matters as much as the training. Lonnie Ali, who knew the champion best, has explained what the role required: “the courage and the conviction, the heart,” as well as the looks — he had to have “the package,” because Ali did.
Jaalen Best’s Acting Style
It is too early for a settled critical verdict on Best — any biography claiming otherwise is guessing. But his short career shows a pattern worth noticing.
His roles have grown steadily in demand: a horror anthology episode, a procedural guest spot, a recurring part in a sports drama, now the lead in a prestige biographical series — the résumé of an actor tested at each level and passing, with the range to carry both boxing spectacle and intimate family scenes.
What has drawn the most comment so far is his preparation; eight months of training for one role suggests a work ethic this industry remembers. The November 4 premiere will give audiences their first full look at him in a leading part, and that performance will define his reputation.
Personal Life
Jaalen Best keeps his personal life private, and there is very little verified public information about his family or relationships. No reliable source has published details about a partner or children, and Best has not made his private life part of his public profile.
That is understandable: until The Greatest, he was a jobbing actor rather than a celebrity, and what is known of him off screen comes through his work — North Carolina roots, community theatre, a serious approach to the role of his life. More may emerge in premiere interviews; until then, the public story is the work.
Jaalen Best’s Net Worth
Search for Jaalen Best’s net worth and you will find numbers — but do not trust them. As of October 2026, no verified net worth figure for Jaalen Best exists; any site stating a precise amount is guessing, without access to his contracts or finances.
The honest context: before The Greatest, his income came from guest and recurring television roles — respectable, but modest by Hollywood standards. Leading a global Prime Video series changes that picture significantly, and his signing with M88 points to a team expecting major offers. But a lead actor’s salary is not public information, and responsible reporting does not turn “his career is taking off” into an invented dollar figure.
So: his earnings are very likely rising sharply, his true net worth is not publicly known, and any specific number online is speculation.
Jaalen Best’s Filmography at a Glance
| Year | Title | Role | Notes |
|---|---|---|---|
| 2022 | American Horror Stories | Hot Guy | 1 episode |
| 2023 | All American: Homecoming | Ryan Craig | 3 episodes |
| 2023 | Magnum P.I. | Teammate #1 | 1 episode |
| 2026 | The Greatest | Cassius Clay / Muhammad Ali | Lead role, 8 episodes |
What Is Next for Jaalen Best?
The immediate future is simple: November 4, 2026, when all eight episodes arrive on Prime Video worldwide. For an actor with four screen credits, a global premiere on that scale brings extraordinary exposure in a single day — and his performance will inevitably be compared with famous predecessors, most obviously Will Smith, who earned an Oscar nomination for playing Ali in the 2001 film Ali.
Beyond the premiere, the signals are promising: major-league representation in M88 and WME, a showrunner who reportedly has plans beyond one season, and a breakout story — small-town theatre kid becomes Muhammad Ali — that Hollywood loves to reward. No further projects have been announced yet; the industry is waiting to see the performance first.
One thing is settled. At 28, Best has landed the role a hundred better-known actors would have wanted. The rest of his career starts here.
The casting was debated by TV fans from the moment it was announced — a Reddit thread on r/television about The Greatest being greenlit at Prime Video covered the news that Jaalen Best would star as Ali, with Ali’s widow Lonnie Ali as an executive producer.
Frequently Asked Questions
How old is Jaalen Best?
Jaalen Best is 28 years old. He was born on June 1, 1998, and turned 28 in June 2026.
When is Jaalen Best’s birthday?
His birthday is June 1. Born on June 1, 1998, he will turn 29 on June 1, 2027.
Who plays Muhammad Ali in The Greatest on Prime Video?
Jaalen Best plays the young Cassius Clay, who later became Muhammad Ali. It is his first leading role, in the first authorized scripted series about Ali’s life.
When does The Greatest premiere?
All eight episodes premiere on Prime Video on November 4, 2026, in more than 240 countries and territories. The trailer was released on October 14, 2026.
What else has Jaalen Best acted in?
He played Ryan Craig in three episodes of All American: Homecoming (2023), and appeared in single episodes of Magnum P.I. (2023) and American Horror Stories (2022).
What is Jaalen Best’s net worth?
There is no verified public figure. Websites listing a specific amount are speculating, and his salary for The Greatest has not been made public.
Conclusion
Jaalen Best is 28 years old, born on June 1, 1998 — and on the verge of a level of fame most actors never reach. His story so far is short: community theatre in North Carolina, student life at East Carolina University, a handful of television guest spots, and then, suddenly, the gloves of Muhammad Ali.
When The Greatest premieres on November 4, 2026, audiences in more than 240 countries will meet Cassius Clay through his performance — the footwork he spent eight months learning, the voice he studied interview by interview. However the reviews land, he has already done the hardest thing a young actor can do: he earned the chance. The greatest test of his career begins, fittingly, in the ring.
Read next: Meet another rising young star in our guide to Nell Fisher’s age and her Stranger Things role.