Seth Rogen as Mac Radner

Zac Efron as Teddy Sanders

Rose Byrne as Kelly Radner

Dave Franco as Pete Regazolli

Christopher Mintz-Plasse as Scoonie Schofield

Jerrod Carmichael as Garf

Ike Barinholtz as Jimmy Blevins

Carla Gallo as Paula Faldt

Halston Sage as Brooke Shy

Craig Roberts as Assjuice

Lisa Kudrow as Carol Gladstone

Elise Vargas as Stella Radner

Zoey Vargas as Stella Radner

Brian Huskey as Bill Wazowkowski

Ali Cobrin as Whitney

Kira Sternbach as Brittany

Steven Michael Eich as Thumbsucker

Andy Samberg as Toga #1

Akiva Schaffer as Toga #2

Jorma Taccone as Toga #3

Adam Devine as Beer Pong Guy #1

Blake Anderson as Beer Pong Guy #2

Anders Holm as Beer Pong Guy #3

Kyle Newacheck as Beer Pong Guy #4

Jake Johnson as Sebastian Cremmington

Hannibal Buress as Officer Watkins

Liz Cackowski as Wendy the Realtor

Jason Mantzoukas as Dr. Theodorakis

Jesse Heiman as The Babysitter

Randall Park as Rep

Natasha Leggero as Prostitute

Casey Ford Alexander as Gay Couple (uncredited)

Michael Angeloe as Birthday Party Jumper (uncredited)

Fahim Anwar as Rival Frat Guy #1 (uncredited)

Melanie Avalon as Sorority Girl (uncredited)

Chasty Ballesteros as Alecia (uncredited)

Marianne Bourg as Sorority Girl (uncredited)

Erika Del Toro as Sorority Girl (uncredited)

Alanna Dergan as Sorority Girl (uncredited)

Robert Dunne as Pledge (uncredited)

Elsi Eng as Sorority Girl (uncredited)

Ayesha Fraser as Sorority Girl (uncredited)

Danika Galindo as Sorority Girl (uncredited)

Ori Kalmus as Rival Frat Guy #2 (uncredited)

Maria Olsen as Prostitute (uncredited)

Gary Sievers as Homeless Man (uncredited)

Stephen Todt as JJ (uncredited)

Cassandra Starr as Sorority Girl (uncredited)

Valeria Sweet as Sorority Girl (uncredited)

Bridgetta Tomarchio as Sorority Girl (uncredited)