36 Celebs I Did Not Even Realize Guest-Starred On My Fave Teen Dramas

Before he became an action film star and even before playing the lovable Andy Dwyer on Parks and Recreation, Chris Pratt played Ché, Summer's college friend who screwed her over.

Six-time Oscar nominee Amy Adams played Tara's cousin who tried to make her come back home with them in the Season 5 episode "Family."

Fellow Oscar nominee Jessica Chastain played Sarah, Veronica's pregnant neighbor who disappeared.

Chris Pratt isn't the only Marvel star to feature on a 2000s teen drama! Paul Rudd played a washed-up rock star named Desmond Fellows whose tapes were stolen in Season 3 of Veronica Mars.

Oscar-winning director David O'Russell became Serena's boss when he hired her to work on his film version of The Beautiful and the Damned.

Khloé and Kim played themselves — they delivered some dresses from Dash, but Naomi couldn't pay, so they got into a brief argument.

Gilmore Girls was Rami Malek's first union acting gig. He played Andy, a member of Lane's Bible group.

Olivia Wilde iconically played Alex, a bisexual character who dated both Seth and Marissa.

Another Marvel star! Tessa Thompson played Jackie, a girl Veronica eventually befriended whose father was accused of causing the bus crash.

Paris Hilton appeared as Kate, a girl at a party who liked Seth.

I had no idea that Paris did so much acting work! Paris played Caitlin, Veronica's spoiled classmate who dated Logan.

The iconic 2000s star played herself as a Nationals judge.

You might know Maria Menounos best as a reporter on E! News, but she also appeared as Keith's girlfriend–turned–runaway bride, Jules, in Season 2 of One Tree Hill.

You may know him better as the MCU's Bucky Barnes, but before that, Sebastian Stan appeared in numerous Gossip Girl episodes as bad boy Carter Baizen, who slept with Blair and dated Serena.

Seth Rogen played Bob, a stoner Audrey slept with.

Amanda Seyfried played Lilly Kane, Veronica's best friend who was murdered, the same year she played the iconic role of Karen Smith in Mean Girls.

Before stealing our hearts in Call Me by Your Name, Armie Hammer played Gabriel, the con artist Serena thought she married in Spain.

Carmen Electra played Vesta, a burlesque dancer who encouraged Silver to tell her friends about her performing.

Krysten Ritter played Gia Goodman, Veronica's classmate with whom she developed a somewhat shaky friendship. It was actually her first big acting job!

Kelly Ripa played Hiram's mistress. (Fun fact: Kelly and Mark Consuelos, who plays Hiram, are married IRL!)

Denise Richards had a quick cameo as a socialite in the 100th episode of 90210 — she also appeared in an episode of the original Beverly Hills, 90210 back in 1992.

Karlie Kloss appeared briefly in Season 4 as herself at a fashion event.

The former mayor (though current at the time) appeared as someone who was shocked at the news that (SPOILER ALERT) Dan was Gossip Girl.

Nikki Reed played Sadie, Johnny's cousin, who had a brief relationship with Ryan.

Jeff Goldblum played one of Rachel's dads.

Adam Lambert performed on the train during the Halloween episode, and he also had a short conversation with Aria.

Nick Offerman appeared a couple of times as Beau Belleville, Jackson's older brother who once hit on Lorelai.

Whoopi Goldberg played Rachel and Kurt's professor at the New York Academy of the Dramatic Arts.

NeNe Leakes played Roz, coach of the swimming team and later the Cheerios after Sue was fired.

Kate Hudson played Cassandra July, a dance teacher who knocked Rachel down a few pegs.

Pete Wentz very randomly dated Peyton and stayed at Rachel's cabin with the gang on One Tree Hill.

Joe Manganiello played Owen, the bartender friend of Chase's who briefly dated Brooke.

Hilary Duff played Olivia, a starlet who became Vanessa's roommate and Dan's girlfriend.

Tim Gunn appeared as himself in the Season 4 episode where Jenny returned to the Upper East Side to interview with him for her application to Parsons. He famously had a bad experience with Taylor Momsen, who played Jenny, during the filming of his cameo.

Colin Hanks played Grady Bridges, an actor Summer liked who invited them to a party.

Lady Gaga didn't appear as a character, but she did perform in a Season 3 episode of Gossip Girl. It was honestly the biggest guest star appearance ever on a teen drama, IMO.