Celebrities that you totally forgot dated

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It's no secret that Hollywood is filled with celebrities that have all dated each other. After all, when there are that many beautiful people in one place, there is bound to be overlap.

Everyone knows that stars like John Mayer and George Clooney have dated their fair share of different celebs, but for every random celebrity couple that you remember (for better or for worse), there's another pairing that you totally forgot about.

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Kim Kardashian dated Nick Cannon? Yep! Ashton Kutcher was once seeing January Jones? Apparently. Helen Mirren was once dating Liam Neeson?! Yeah, that was a thing.

With the help of the legendary Tumblr "Old Loves" -- as well as our own deep knowledge of celebrity love triangles and hookups -- we put together some of our favorite famous couples that people totally forget about. Check them out in the gallery below:

83 PHOTOS
Celebrities you forgot were once an item
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Celebrities you forgot were once an item

Chris Klein and Katie Holmes

(Photo by SGranitz/WireImage)

Michael Keaton and Courteney Cox

(Photo by Ron Galella, Ltd./WireImage)

Julia Roberts and Kiefer Sutherland

(Photo by Ron Galella, Ltd./WireImage)

Long before Michael Weatherly became Special Agent Anthony Dinozzo on 'NCIS," and Jessica Alba was the founder of the Honest Company, they were engaged to each other after starring on the show "Dark Angel" together. 

 (Photo by Gregg DeGuire/WireImage)

Tom Cruise and Mimi Rogers

(Photo by Ron Galella, Ltd./WireImage)

Kurt Russell and Season Hubley

(Photo by Donaldson Collection/Michael Ochs Archives/Getty Images)

Paula Abdul and John Stamos

(Photo by Ron Galella, Ltd./WireImage)

Jill Schoelen and Brad Pitt

(Photo by Ron Galella, Ltd./WireImage)

Helen Mirren and Liam Neeson

via Old Loves

Matt Damon and Winona Ryder

(Photo by Ron Galella, Ltd./Wireimage)

Shia LaBeouf and Carey Mulligan

(Photo by Ray Tamarra/Getty Images)

Owen Wilson and Sheryl Crow

(Photo by Jim Smeal/WireImage)

Nick Cannon and Kim Kardashian

(Photo by Michael Tran/FilmMagic)

Ashton Kutcher and January Jones

(Photo by Ron Galella, Ltd./WireImage)

Matthew Broderick and Helen Hunt

(Photo by Ron Galella/WireImage)

John Mayer and Jessica Simpson

(Photo by Kevin Mazur/WireImage)

Kimberly Russell and George Clooney

(Photo by Jim Smeal/WireImage)

Billy Bob Thornton Laura Dern

(Photo by Frank Trapper/Corbis via Getty Images)

Liam Neeson and Brooke Shields

(Photo by Raoul Gatchalian/IMAGES /Getty Images)

Joey Lawrence and Keri Russell

(Photo by Ron Galella, Ltd./WireImage)

Wilmer Valderrama and Lindsay Lohan

(Photo by Gregg DeGuire/WireImage for NARAS)

Courteney Cox and Paul Brown

(Photo by Ron Galella/WireImage)

Cameron Diaz and Matt Dillon

(Photo by Ron Galella, Ltd./WireImage)

Rachel Miner and Macaulay Culkin

(Photo by Steve Eichner/Getty Images)

Carson Daly and Tara Reid

(Photo by SGranitz/WireImage)

Amber Rose and Kanye West

(Photo by Kevin Mazur/WireImage)

Jennifer Love Hewitt and Joey Lawrence

(Photo by Ron Galella, Ltd./WireImage)

Drew Barrymore and Fabrizio Moretti

(Photo by Michel Dufour/WireImage)

Tom Green and Drew Barrymore

(WireImage)

Donald Faison and Minka Kelly

(Photo by Jon Kopaloff/FilmMagic)

Kim Kardashian and Kris Humphries // Brody Jenner and Avril Lavigne

Kevin Mazur via Getty Images

Heath Ledger and Heather Graham

(Photo by Jean-Paul Aussenard/WireImage)

Common and Serena Williams

(Photo by Stephen Lovekin/Getty Images)

Christina Ricci and Adam Goldberg

(Photo by Sylvain Gaboury/FilmMagic)

Antonio Banderas and Ana Leza

(Photo by Ron Galella/WireImage)

Diane Keaton and Warren Beatty

(Photo by Ron Galella/WireImage)

Sarah Jessica Parker and Robert Downey, Jr.

(Photo by Ron Galella, Ltd./WireImage)

Vivica A. Fox and Dennis Rodman

(Photo by Ron Galella, Ltd./WireImage)

Drew Barrymore and Corey Feldman

(Photo by S. Granitz/WireImage)

Cher and Val Kilmer

(Photo by Barry King/WireImage)

Liza Minnelli and Desi Arnaz Jr.

(Photo by Ron Galella/WireImage)

John Mayer and Taylor Swift

(Photo by Theo Wargo/WireImage)

Geena Davis and Jeff Goldblum

(Photo by Barry King/WireImage)

Anne Heche and Ellen DeGeneres

(Photo by Ron Galella/WireImage)

Gilda Radner and Bill Murray

(Photo by Ron Galella/WireImage)

Whoopi Goldberg and Lyle Trachtenberg

(Photo by Ron Galella, Ltd./WireImage)

Robert De Niro and Toukie Smith

(Photo by Robin Platzer/IMAGES/Getty Images)

John Mayer and Minka Kelly

(Photo by James Devaney/WireImage)

David Moscow and Kerry Washington

(Photo by Denise Truscello/WireImage)

Jennifer Aniston and John Mayer

(Photo by Jon Kopaloff/FilmMagic)

Anne Hathaway and Raffaello Follieri

(Photo by Bob Riha Jr/WireImage)

Cameron Diaz and Justin Timberlake

(James Devaney via Getty Images)

Jennifer Garner and Scott Foley

(Photo by: Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)

Dennis Quaid and Meg Ryan

(Photo by David Keeler/Online USA)

Rachael Leigh Cook and Shane West

(Photo by George Pimentel/WireImage)

Christian Slater and Patricia Arquette

(Photo by Ron Galella, Ltd./WireImage)

Sarah Paulson and Cherry Jones

(Photo by E. Charbonneau/WireImage for CW Productions)

Derek Jeter and Minka Kelly

(Photo by Mike Coppola/FilmMagic)

Jon Voight and Eileen Davidson

(Photo by Ron Galella, Ltd./WireImage)

Jon Voight and Stacey Pickren

(Photo by Ron Galella, Ltd./WireImage)

Jake Gyllenhaal and Kirsten Dunst

(Photo by Justin Goff\UK Press via Getty Images)

Scarlett Johansson and Jared Leto

(Photo by Amy Graves/WireImage)

Joaquin Phoenix and Liv Tyler

(Photo by Richard Corkery/NY Daily News Archive via Getty Images)

Sarah Larson and George Clooney

(Photo by James Devaney/WireImage)

George Clooney and Karen Duffy

(Photo by Arnaldo Magnani/Getty Images)

Ben Affleck and Gwyneth Paltrow

(Photo by Ron Galella, Ltd./WireImage)

Samantha Ronson and Lindsay Lohan

(Photo by Jamie McCarthy/WireImage for Glaceau)

Chili (from TLC) and Usher

(Photo by SGranitz/WireImage for BET Entertainment)

Kylie Minogue and Lenny Kravitz

(Photo by Dave M. Benett/Getty Images)

Brittany Murphy and Ashton Kutcher

(Photo by Jim Smeal/WireImage)

Miley Cyrus and Nick Jonas

(Photo by Mathew Imaging/FilmMagic)

Fiona Apple and David Blaine

(Photo by Evan Agostini/Liaison)

Jessica Biel and Chris Evans

(Photo by Jon Kopaloff/FilmMagic)

Drew Barrymore and David Arquette

(Photo by Ron Galella, Ltd./WireImage)

Jennifer Lopez and Chris Judd

(Photo credit should read STAN HONDA/AFP/Getty Images)

Kid Rock and Pamela Anderson

(Photo by Rick Diamond/WireImage)

Christina Applegate and Brad Pitt

(Photo by Barry King/WireImage)

Jared Leto and Cameron Diaz

(Photo by Jeff Kravitz/FilmMagic)

Leonardo DiCaprio and Gisele Bundchen

(Photo by Jeffrey Mayer/WireImage)

Patricia Arquette and Nicolas Cage

(Photo by Ron Galella, Ltd./WireImage)

Sofia Coppola and Keanu Reeves

(Photo by Ron Galella/WireImage)

Matt Damon and Skylar Satenstein

(Photo by Ron Galella, Ltd./WireImage)

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