Lou
Rob Corddry
Nick
Craig Robinson
Jacob
Clark Duke
Adam Jr.
Adam Scott
Repairman
Chevy Chase
Sophie
Bianca Haase
Kelly
Collette Wolfe
Jill
Gillian Jacobs
Brad
Kumail Nanjiani
Susan
Gretchen Koerner
Gary Winkle
Jason Jones*
Gary Winkle
Jason Jones
Courtney
Kellee Stewart
Terry
Josh Heald
Adam's Fiancee
Collette Wolf
Herself
Lisa Loeb
Herself
Jessica Williams
Himself
Bruce Buffer
Shot Girl
Mariana Paola Vicente
Choozy Doozy Host
Christian Slater
J-Bird
Adam Herschman
DJ
Jason Richard Allan Foster
Bridesmaid
Olivia Jordan
Christine
Christine Bently
Bottle Service Guy
Freddie Poole
Excited Girl
Stacey Asaro
Nerdy PA
Aaron Jay Rome
Financial News Anchor
Darian Trotter
Bridesmaid
Kisha Sierra
Adam (uncredited)
John Cusack
Belligerent Guy at Wedding
Colby Boothman-Shepard
Man at Wedding
Shawn Sanz
Christine
Christine Bently Quinn
Attractive Nurse
Jewel Grosch
Choreographer
Ashley B. Deaton
Dancer
Brianna Nowlin
Dancer
Jennifer Williams
Dancer
Amy Marie Canalis
Dancer
Christina Marie Calamia
Dancer
Cassidy Elizabeth Lefort
Dancer
Kelly Connolly
Angela Kerecz
Chevy