Justin Long

Adam

Cobie Smulders

Allison

Ryan Hansen

Aaron

John Cho

Mark

Kristen Schaal

Talula

Peter Gallagher

Orson Schwartzman

Dana Delany

Wendy (Allison's Mom)

Rick Overton

Dean (Allison's Dad)

Lea Thompson

Deb (Adam's Mom)

Brady Rubin

Grandma Rose

Luis Guzmán

Federico

Ginger Gonzaga

Helen

Lo Mutuc

Claire

Briga Heelan

Julie

Parvesh Cheena

Rohan

Malcolm Barrett

Greg

Dov Tiefenbach

David

Charlotte McKinney

Charlotte

Manu Intiraymi

Lee

Barbara Browne

Susan

André Tardieu

Jean-Pierre

Talia Toms

Leandra (Bridesmaid)

Adam Rose

Alan (Co-Worker)

Sam Hennings

Priest (Father Jack)

Ser'Darius Blain

Wedding DJ

Emerson Min

Emerson

Ivy George

Ivy (Flower Girl)

Babar Peerzada

Chaplin (Lead Busboy)

Gabriel Berber

Busboy 1

Victor Douglas

Busboy 2

Ricardo Martín

Wedding Photographer

James Krisel

Guy at Party

Vella Lovell

Jen (uncredited)

Andrea LeBlanc

Lindsay (uncredited)

Patrick Rafferty

Elevator Tourist (uncredited)

Mike Guerra

Engaged Couple (uncredited)

Ashley Platz

Engaged Couple (uncredited)