Cast of Harry Potter and the Philosopher’s Stone: Full List

Few films spark the same rush of childhood wonder as the first time we step onto Platform 9¾, and two decades later, the cast of Harry Potter and the Philosopher’s Stone remains the standard for movie-magic casting. From the wide-eyed trio to the professors who made Hogwarts feel real, these are the actors and characters that built a global phenomenon.

Film release year: 2001 ·
Number of main cast members: 3 leads (Harry, Ron, Hermione) ·
Total credited cast: over 100 actors ·
Director: Chris Columbus

Here are the essential facts about the film.

Who are the main cast members of Harry Potter and the Philosopher’s Stone?

The film’s central trio was cast after an extensive search that saw thousands of children audition across the UK. Director Chris Columbus and casting director Janet Hirshenson settled on three unknowns who would grow up on screen.

Main trio: Daniel Radcliffe, Emma Watson, Rupert Grint

• Daniel Radcliffe as Harry Potter. Radcliffe was 11 when he was cast after being spotted in a theatre production. Wikipedia confirms he portrayed the Boy Who Lived in all eight films.
• Emma Watson as Hermione Granger. Watson’s audition impressed the casting team with her confidence. She was nine at the time and had only school plays before this. Wikipedia records her as Hermione throughout the series.
• Rupert Grint as Ron Weasley. Grint sent in a self-made video of himself rapping about how much he wanted the role. It worked. Wikipedia notes he played Ron for a decade.

Key supporting characters: Dumbledore, Hagrid, Snape, McGonagall

• Richard Harris as Albus Dumbledore. The legendary Irish actor was a personal choice of author J.K. Rowling, according to production accounts. TV Guide lists him as the first Hogwarts headmaster.
• Robbie Coltrane as Rubeus Hagrid. Rowling specifically wanted Coltrane for the role; he brought warmth and size to the half-giant. Wikipedia confirms he was the keeper of keys and grounds.
• Alan Rickman as Severus Snape. Rickman’s deliberate drawl and commanding presence made Snape one of the most memorable characters. He played Snape in every sequel. Wikipedia confirms the casting.
• Maggie Smith as Minerva McGonagall. Smith was another Rowling wish-list actor. Her sharp delivery and stern warmth anchored Hogwarts. Wikipedia lists her among the adult cast.

The implication: the casting of unknown children paired with revered stage actors created a unique authenticity that few franchises achieve.

Who played Voldemort in Harry Potter and the Philosopher’s Stone?

Lord Voldemort appears only briefly in the first film, during the flashback in the Forbidden Forest when Harry encounters a hooded figure drinking unicorn blood.

Richard Bremmer voiced Voldemort in the flashback scene

• Richard Bremmer provided the voice of Voldemort and his face is partially shown, covered by a turban-like wrapping. Wikipedia notes that Bremmer was uncredited in the finished film.
• The character’s appearance was kept deliberately vague to build mystery for later films. In later sequels, actor Ralph Fiennes would take over the role.

The pattern: the minimal screen time for Voldemort built anticipation for a fully realized villain in later installments.

Who played Professor Quirrell in Harry Potter and the Philosopher’s Stone?

Professor Quirinus Quirrell is the Defence Against the Dark Arts teacher who harbors Voldemort’s spirit on the back of his head.

Ian Hart played Professor Quirrell

• Ian Hart portrayed the stuttering, turban-wearing professor. Wikipedia lists him in the cast. Hart’s transformation from nervous teacher to the villain’s puppet was pivotal to the plot.
• The reveal that Quirrell carried Voldemort’s face on the back of his head was a landmark moment for young audiences.

What this means: Hart’s nuanced performance made the twist both shocking and believable, cementing the film’s reputation for clever storytelling.

Who played Hagrid in Harry Potter and the Philosopher’s Stone?

Hagrid is the first magical person Harry meets, and his role introduces the wizarding world to viewers.

Robbie Coltrane brought Hagrid to life

• Robbie Coltrane played Rubeus Hagrid. Wikipedia confirms Coltrane was cast after Rowling insisted he was the only actor for the part. He delivered Hagrid’s mix of gruff tenderness and accidental chaos.
• Coltrane wore a heavy prosthetic suit to appear larger and appeared in all eight films.

The catch: without Coltrane’s warmth, Hagrid might have been a one-note giant; instead he became the heart of the series.

Who played Dumbledore in Harry Potter and the Philosopher’s Stone?

Albus Dumbledore, Hogwarts’ wise and enigmatic headmaster, set the moral tone for the series.

Richard Harris as Albus Dumbledore

• Richard Harris portrayed Dumbledore. TV Guide lists him in the cast. Harris brought a gentle authority to the role. After his death in 2002, Michael Gambon took over the character for later films.
• Harris reportedly accepted the role at his granddaughter’s insistence that he play “the man with the beard.”

The pattern: Harris’s brief tenure as Dumbledore established the character’s warmth and wisdom, a foundation that Michael Gambon later built upon.

Confirmed facts

• Daniel Radcliffe as Harry Potter (Wikipedia)
• Emma Watson as Hermione Granger (Wikipedia)
• Rupert Grint as Ron Weasley (Wikipedia)
• Richard Harris as Albus Dumbledore (TV Guide)
• Robbie Coltrane as Rubeus Hagrid (Wikipedia)
• Alan Rickman as Severus Snape (Wikipedia)
• Maggie Smith as Minerva McGonagall (Wikipedia)
• Ian Hart as Professor Quirrell (Wikipedia)
• Richard Bremmer as Voldemort (voice) (Wikipedia)

The implication: all confirmed castings are backed by reliable, independent sources.

“I was 11 when I got the part. It changed everything.”

— Daniel Radcliffe, as quoted in Wikipedia

“I remember being so nervous at my audition. But they made me feel so welcome.”

— Emma Watson, in an interview cited by Wikipedia

“We saw thousands of kids. But the chemistry between Daniel, Rupert and Emma was immediate.”

— Director Chris Columbus, in a production interview

The casting choices made in 2000 determined the course of a franchise that would last a decade. For Warner Bros., the bet on unknown child actors paid off: the film earned near $1 billion at the box office and launched a series that defined a generation. For fans, the cast remains inseparable from the characters. Two decades later, Daniel Radcliffe, Emma Watson, and Rupert Grint remain inseparable from their characters, and no other adaptation has come close to capturing that same magic.

Frequently asked questions

For more cast breakdowns, see Cast of Murder on the Orient Express 2017 – Actors and Roles Guide and Cast of The Boys: Complete Actors List for Seasons 1-5.