 | Seth Rogen | .... | Mac Radner |
 | Rose Byrne | .... | Kelly Radner |
 | Elise Vargas | .... | Stella |
 | Zoey Vargas | .... | Stella |
 | Brian Huskey | .... | Bill Wazowkowski |
 | Ike Barinholtz | .... | Jimmy |
 | Carla Gallo | .... | Paula |
 | Zac Efron | .... | Teddy Sanders |
 | Dave Franco | .... | Pete |
 | Halston Sage | .... | Brooke |
 | Christopher Mintz-Plasse | .... | Scoonie |
 | Jerrod Carmichael | .... | Garf |
 | Craig Roberts | .... | Assjuice |
 | Ali Cobrin | .... | Whitney |
 | Kira Sternbach | .... | Brittany |
 | Fahim Anwar | .... | Rival Frat Guy #1 |
 | Ori Kalmus | .... | Rival Frat Guy #2 |
 | Steven Michael Eich | .... | Thumbsucker |
 | Andy Samberg | .... | Toga #1 |
 | Akiva Schaffer | .... | Toga #2 |
 | Jorma Taccone | .... | Toga #3 |
 | Adam Devine | .... | Beer Pong Guy #1 |
 | Blake Anderson | .... | Beer Pong Guy #2 |
 | Anders Holm | .... | Beer Pong Guy #3 |
 | Kyle Newacheck | .... | Beer Pong Guy #4 |
 | Jake Johnson | .... | Sebastian Cremmington |
 | Hannibal Buress | .... | Officer Watkins |
 | Liz Cackowski | .... | Wendy the Realtor |
 | Jason Mantzoukas | .... | Doctor Theodorakis |
 | Lisa Kudrow | .... | Dean Carol Gladstone |
 | Jesse Heiman | .... | The Babysitter |
 | Randall Park | .... | Rep |
 | Natasha Leggero | .... | Prostitute |
 | Casey Ford Alexander | .... | Gay Couple (uncredited) |
 | Robert Michael Anderson | .... | 30's Frat Boy (uncredited) |
 | Michael Angeloe | .... | Birthday Party Jumper (uncredited) |
 | Meghan Aruffo | .... | Sorority Girl (uncredited) |
 | Melanie Avalon | .... | Sorority Girl (uncredited) |
 | Justin Bailey | .... | Fraternity Brother (uncredited) |
 | Thomas R. Baker | .... | Alien Guard (uncredited) |
 | Chasty Ballesteros | .... | Alecia (uncredited) |
 | Soleil Ceseña Bouchereau | .... | Sorority Girl (uncredited) |
 | Marianne Bourg | .... | Sorority Girl (uncredited) |
 | Sasha Bujnak | .... | Toga Party Beer Girl (uncredited) |
 | Ruth Cadiente | .... | Sorority Girl (uncredited) |
 | Robbie Carlysle | .... | Dr. Junk (uncredited) |
 | Aaron Colom | .... | Street Dice Player (uncredited) |
 | Ilia Constantine | .... | Tiger (uncredited) |
 | Zack Cosby | .... | Stink (uncredited) |
 | Nick de Graffenreid | .... | 1970's Delta Psi Beta President (uncredited) |
 | Holli Dean | .... | Sorority Girl (uncredited) |
 | Alanna Dergan | .... | Sorority Girl (uncredited) |
 | Robert Dunne | .... | Pledge (uncredited) |
 | Fernando Duran | .... | Delta Psi Fraternity Brother (uncredited) |
 | Mark Casimir Dyniewicz, jr. | .... | Homeless #3 (uncredited) |
 | Elsi Eng | .... | Sorority Girl (uncredited) |
 | Ayesha Fraser | .... | Sorority Girl (uncredited) |
 | Danika Galindo | .... | Sorority Girl (uncredited) |
 | Courtney Hart | .... | Sorority Girl (uncredited) |
 | Antonio James | .... | Party Goer (uncredited) |
 | Nivine Jay | .... | Sorority Girl (uncredited) |
 | Bettina Kenney | .... | Siri (uncredited, Stimme) |
 | Diana Knight | .... | Sorority Girl (uncredited) |
 | Ashley Leilani | .... | Sorority Girl (uncredited) |
 | Jose Lizarde Jr. | .... | Party Guest (uncredited) |
 | Scot London | .... | Frat Party DJ (uncredited) |
 | Johnny Martini | .... | Frat Bro (uncredited) |
 | Derek McEntire | .... | Frat Guy (uncredited) |
 | Cameron Miller | .... | 1930's Frat Brother (uncredited) |
 | Nathan Mohebbi | .... | Neighbor (uncredited) |
 | Rachel Ann Mullins | .... | Delta Psi Beta Little Sister (uncredited) |
 | Demetrice Nguyen | .... | Noah (uncredited) |
 | Christian O'Brien | .... | Rif Raf (uncredited) |
 | Maria Olsen | .... | Prostitute (uncredited) |
 | Jason Pickar | .... | Riff Raff (uncredited) |
 | David James Pryce | .... | Delta Psi Fraternity Brother (uncredited) |
 | Vedzih Redzepovic | .... | Party Goer (uncredited) |
 | Susana Rodriguez | .... | Sorority Girl (uncredited) |
 | Daniel Roman | .... | Student (uncredited) |
 | Gary Sievers | .... | Homeless Man (uncredited) |
 | Allen Singh | .... | Thug #2 (uncredited) |
 | Cassandra Starr | .... | Sorority Girl (uncredited) |
 | Justin Teitell | .... | Rival Frat Bro (uncredited) |
 | Stephen Todt | .... | JJ (uncredited) |
 | Bridgetta Tomarchio | .... | Sorority Girl (uncredited) |
 | Amber Sharae Topsy | .... | Sorority Girl (uncredited) |
 | Erika Del Toro | .... | Sorority Girl (uncredited) |
 | Olia Voronkova | .... | Sorority Girl (uncredited) |
 | D. J. Waldman | .... | Ruth Bader Ginsburg (uncredited) |
 | Taylor West | .... | Stoner (uncredited) |
 | Chad Zapfe | .... | Frat Guy (uncredited) |