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
Charlyne Yi
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)