2.Julianne Hough was also in the Harry Potter series as an extra, and you can see her cheering on Gryffindor in the first movie.
3.Channing Tatum was an extra in War of the Worlds, and you can very briefly see him running alongside Tom Cruise. Apparently, he did originally have dialogue in the scene where the church is destroyed — but it ended up being cut.
4.Before This Is Us or Heroes, Milo Ventimiglia played "Party Guest #1" in an episode of The Fresh Prince of Bel-Air. Technically Milo isn't an extra, as he does have one line, and he later described it as his "first real Hollywood paycheck."
5.If you're a fan of Degrassi High: School's Out, you might be able to spot Sandra Oh as a waitress in the background of one of the episodes.
6.Kelly Clarkson was an extra on Sabrina the Teenage Witch a few months before she auditioned for American Idol.
7.Megan Fox appeared as "Stars-and-Stripes Bikini Kid Dancing Under Waterfall" in Bad Boys II. Her casting and treatment on set later led to considerable criticism, as she was just 15 at the time.
8.Jon Hamm was in the second episode of Ally McBeal as "Gorgeous Guy at Bar." He later said of the casting process, "I was literally picked out of a line of people where the guy was walking down the line and was like, 'Eh, you!'"
9.In Dazed and Confused, Renée Zellweger appeared in a number of scenes as an extra. Renée and Matthew McConaughey would go on to star in Texas Chainsaw Massacre: The Next Generation together the following year, and even shared an agent.
10.Bruce Willis appeared as an extra in a court room scene in the 1982 movie The Verdict.
11.Tobin Bell, who you might know as Jigsaw in Saw, is also an extra in the same scene.
12.Kristen Stewart played "Ring Toss Girl" in The Flintstones in Viva Rock Vegas when she was just 10 years old.
13.Ben Affleck played "Basketball Player #10" on an episode of the Buffy the Vampire Slayer movie. Although Ben technically did have one line, it ended up being dubbed over, as, in Ben's own words, it was "so bad."
14.Steve Carell briefly appeared in the 1991 John Hughes movie Curly Sue as a waiter. He later said, "I shot for three days and I was incredibly excited, and I couldn't have been more nervous."
15.Finally, Eva Mendes makes an appearance as a bridesmaid that Will Ferrell can't stop gawking at in the 1998 movie A Night at the Roxbury. The two would later play husband and wife in The Other Guys.
