Cast of Wedding Crashers

Owen Wilson plays the character John Beckwith.

Vince Vaughn portrays the character Jeremy Grey.

Christopher Walken takes on the role of Secretary William Cleary.

Rachel McAdams portrays the character Claire Cleary.

Isla Fisher plays the character Gloria Cleary.

Jane Seymour takes on the role of Kathleen Cleary.

Ellen Albertini Dow portrays the character Grandma Mary Cleary.

Keir O'Donnell plays the character Todd Cleary.