Kirsten Dunst as Regan Crawford

Rebel Wilson as Becky Archer

Lizzy Caplan as Gena Myers

Isla Fisher as Katie Lawrence

James Marsden as Trevor Graham

Adam Scott as Clyde Goddard

Kyle Bornheimer as Joe Barnes

Hayes MacArthur as Dale Beaumont

Ann Dowd as Victoria Archer

Andrew Rannells as Manny

Sue Jean Kim as Wedding Planner

Ella Rae Peck as Stefanie

Shauna Miles as Theresa

Arden Myrin as Melissa

Candy Buckley as Sheila

Horatio Sanz as Barely Attractive Guy

June Diane Raphael as Cool Stripper

Paul Corning Jr. as Jack Johnson Guy

Anna Rose Hopkins as Club Monaco Customer

Megan Neuringer as Singing Cousin 1

Leslie Meisel as Singing Cousin 2

Jenn Schatz as Geeky Bridesmaid

Beth Hoyt as Blonde Bridesmaid

Melissa Stephens as Wasted Stripper

Chris Cardona as Scores Bouncer

Erik Parian as Band Singer