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Renée Zellweger - The 'Bridget Jones' actress was an extra in the film 'Dazed and Confused' in 1993.

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Jackie Chan - Imagine a film with Jackie Chan AND Bruce Lee... It turns out that such a thing really does exist. Few people know that Jackie had a few lines in 'Fist of Fury' (1972) and 'Enter the Dragon' (1973)–two Bruce Lee classics.

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Bruce Willis - Back in 1982, we could see Willis sitting in a courtroom, with hair, as an extra in 'The Verdict.'

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Matt Damon -

The famous actor played a baseball fan in 'Field of Dreams' in 1989.

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Audrey Hepburn - The iconic actress was an extra in the movie 'Sauce Tartare' in 1949.

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Julia Roberts -

Before becoming hugely famous, the actress had a small role in the 1987 film 'Firehouse.'

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Megan Fox -

In 2003, the actress appeared in a brief dancing scene in the movie 'Bad Boys II.'

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Rudolph Valentino - The heartthrob was an extra in a number of silent films, including 'The Battle of the Sexes' in 1914.

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Sylvester Stallone - Sly Stallone can be seen as an extra in Woody Allen's 1971 film 'Bananas.'

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Clark Gable - Clark Gable made an unaccredited appearance as an extra in the 1925 film 'The Merry Widow.'

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Brad Pitt -

The actor appeared in 'Less Than Zero' in 1987 without saying a single line. He was credited as "Partygoer/Preppie Guy at Fight."

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Jennifer Garner -

In the 1997 film 'Deconstructing Harry,' Jennifer Garner is credited as "Woman in the Elevator."

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Channing Tatum - Channing Tatum appeared in the music video for Ricky Martin's 'She Bangs' in 2000. He was also an extra in 'War of the Worlds' in 2005.

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Clint Eastwood - The veteran actor can be seen playing an unaccredited role in the 1955 film 'Lady Godiva,' among others.

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John Wayne - John Wayne might be one of the greatest Hollywood stars in history, but he was not credited for his role in 'The Draw-Back' in 1927.

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George Clooney -

The Hollywood heartthrob appears in the 1978 TV miniseries 'Centennial,' as an extra. He was just 17.

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Arnold Schwarzenegger - Before his breakthrough role as Conan the Barbarian, Arnie worked as an extra in the 1973 film 'The Long Goodbye.'

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Charlize Theron -

Charlize Theron played an extra role in the 1995 horror movie 'Children of the Corn III: Urban Harvest.'

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David Bowie -

Bowie can be seen in a bar scene in the 1969 British film 'The Virgin Soldiers.'

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Cuba Gooding Jr. - Remember the guy in the barber's chair in Eddie Murphy's 1998 film 'Coming to America'? Maybe not. But he was there!

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Kristen Stewart -

The 'Twilight' star was credited as "Girl in Fountain Line" in the 1999 Disney Channel movie 'The Thirteenth Year.'

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Jean-Claude Van Damme - Before he became an action hero, JCVD, aka the "Muscles from Brussels," made an appearance in the 1984 breakdancing movie 'Breakin'.'

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Evangeline Lilly - The 'Ant Man' and 'Lost' actress can be seen in a high school scene of the 2003 horror movie 'Freddy vs. Jason.'

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Willem Dafoe - You can spot the actor in the 1980 film 'Heaven's Gate.' But he was fired by the director Michael Cimino for laughing too loudly.

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Jeff Goldblum - The 'Jurassic Park' and 'The Fly' actor first got a part as an extra in the Woody Allen movie 'Annie Hall' (1977).

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Marilyn Monroe -

Before she became Hollywood's famous blonde bombshell, the actress could be seen in a scene sitting in a canoe in the 1948 movie 'Scudda Hoo! Scudda Hay!'

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Heath Ledger -

A 13-year-old Heath Ledger can be seen working as an extra in the Australian movie 'Clowning Around' (1992).

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Phil Collins -

The musician might not be the biggest movie star on this list, but this is worth mentioning. A 13-year-old Phil Collins can be seen as an audience extra in the 1964 Beatles' movie 'A Hard Day's Night.'

Sources: (Ranker) (Backstage)

See also: Famous musicians who got into acting

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