After the show, it's the afterparty, and Hollywood's hottest stars and Oscars attendees made sure to bring their A-games to the Vanity Fair post-Oscars bash in LA on Sunday night. After walking the Academy Awards red carpet , celebrities headed inside and began to let loose. There were hot guys mingling (we see you, Channing Tatum  and Chris Hemsworth!) and ladies like Jennifer Garner , Molly Sims, and Kristen Bell  enjoying an exciting moms' night out. We even saw high-profile exes Amy Poehler  and Will Arnett  chatting it up! Cute couples got in on the fun as well: Sienna Miller  and Tom Sturridge cozied up together, and Adam Levine stuck close to his bride-to-be, model Behati Prinsloo. Keep reading to see all the fun moments at Vanity Fair's annual afterparty!
Leonardo DiCaprio  partied with his mom, Irmelin Indenbirken.
Sacha Baron Cohen  and Isla Fisher  chatted it up with Diane Kruger  and Joshua Jackson .
Channing Tatum  was cracking up while mingling with Chris Hemsworth.
Jared Leto  included his best supporting actor Oscar in an excited snap with Rosario Dawson  and Spike Lee.
Bradley Cooper  posed with his mom, Gloria, and his sister Holly.
Tom Sturridge took a bite out of Sienna Miller .
Lupita Nyong'o couldn't contain her Oscar-winning excitement with Rosario Dawson  during the bash.
Reese Witherspoon , Jennifer Garner , Allison Williams, and Elizabeth Banks grouped up for a glamorous shot.
Ben Affleck  and Jennifer Garner  posed together for a sweet photo.
Lupita Nyong'o held on to her best supporting actress Oscar while posing pretty with Regina Hall and Gabrielle Union .
Reese Witherspoon  and Elizabeth Banks proved that blondes have more fun during the bash.
Lupita Nyong'o got a sweet handshake from legendary actor Sidney Poitier.
Amy Adams  and her fiancé, Darren Le Gallo, partied it up with Her director Spike Jonze and singer Karen O.
Amy Poehler  and Seth Rogen  shared a laugh.
Kristen Bell  and Dax Shepard shared a funny moment during the party.
Amy Poehler  got a serious lift from some seriously funny friends — Andy Samberg , Nick Offerman, Adam Scott, Megan Mullally, Bill Hader, Bill Murray , and Paul Rudd  all tried to carry her during the party!
Ben Affleck  got caught in a Hemsworth sandwich by brothers Liam and Chris — lucky guy!
Terry Richardson snapped a photo of Jared Leto , Rosario Dawson , and Spike Lee.
Model Karolina Kurkova posed for a photo with Bradley Cooper  and his girlfriend, Suki Waterhouse.
Jessica Biel  and Kristen Bell  grabbed on to each other.
Reese Witherspoon  met up with her How Do You Know costar Paul Rudd .
Chrissy Teigen and John Legend  posed together after his performance at the bash.
Judd Apatow and Leslie Mann showed off their photo-booth snaps.
Reese Witherspoon  and Elizabeth Banks posed for a snap together.
Jared Leto  was surrounded by lovely ladies during the party — Sarah Paulson, Jane Fonda, Anjelica Huston, and Jared's mom, Constance, all helped him celebrate his big win.
Lupita Nyong'o celebrated her Oscar win with music producer Quincy Jones.
Behati Prinsloo and Adam Levine cuddled by the bar.
Exes Will Arnett  and Amy Poehler  caught up during the party.
Jon Hamm  got the giggles while chatting with Andy Samberg .
Allison Williams showed off her engagement ring with her new fiancé, Ricky Van Veen.
Bradley Cooper  had the attention of Scott Eastwood.
Molly Sims and Jennifer Garner  had a serious sit-down.
Bono , Portia de Rossi  and Ellen DeGeneres  locked lips inside the party.