Owen Wilson
John Beckwith
Acting
Vince Vaughn
Jeremy Grey
Acting
Christopher Walken
Secretary William Cleary
Acting
Rachel McAdams
Claire Cleary
Acting
Isla Fisher
Gloria Cleary
Acting
Jane Seymour
Kathleen Cleary
Acting
Ellen Albertini Dow
Grandma Mary Cleary
Acting
Keir O'Donnell
Todd Cleary
Acting
Bradley Cooper
Zachary 'Sack' Lodge
Acting
Ron Canada
Randolph
Acting
Henry Gibson
Father O'Neil
Acting
Dwight Yoakam
Mr. Kroeger
Acting
Rebecca De Mornay
Mrs. Kroeger
Acting
David Conrad
Trap
Acting
Jennifer Alden
Christina Cleary
Acting
Geoff Stults
Craig Garthe
Acting
Diora Baird
Vivian
Acting
Kathryn Joosten
Chazz's Mom
Acting
Naureen Zaim
Hindu Woman
Acting
Norma Michaels
Old Irish Woman
Acting
James Carville
Himself (uncredited)
Acting
Will Ferrell
Chazz Reinhold (uncredited)
Acting
John McCain
Himself (uncredited)
Acting
Lindsay Schoneweis
Woman in Hat (uncredited)
Acting
Kelsey Wedeen
Bridesmaid (uncredited)
Acting
Rachel Sterling
Brunette
Acting
Camille Anderson
Camille
Acting
Ivana Bozilovic
Ivana
Acting
Tanaya Nicole
Woman at Jewish Reception
Acting