cast
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Owen Wilson
John Beckwith
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Vince Vaughn
Jeremy Grey
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Christopher Walken
Secretary Cleary
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Rachel McAdams
Claire Cleary
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Isla Fisher
Gloria Cleary
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Jane Seymour
Kathleen Cleary
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Ellen Albertini Dow
Grandma Mary Cleary
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Keir O'Donnell
Todd Cleary
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Bradley Cooper
Sack Lodge
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Ron Canada
Randolph
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Henry Gibson
Father O'Neil
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Dwight Yoakam
Mr. Kroeger
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Rebecca De Mornay
Mrs. Kroeger
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David Conrad
Trap
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Jennifer Alden
Christina Cleary
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Geoff Stults
Craig
- James McDonnell Attorney
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Jesse Henecke
Attorney
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Lou Cutell
Old Jewish Man
- Sparkle Old Jewish Woman
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Frank Ray Perilli
Old Italian Man
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Patricia Place
Old Italian Woman
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Chao-Li Chi
Old Chinese Man
- Norma Michaels Old Irish Woman
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Noel De Souza
Old Indian Man
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Ivana Bozilovic
Ivana
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Camille Anderson
Camille
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Rachel Sterling
Brunette
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Diora Baird
Vivian
- Ned Schmidtke Frank Meyers
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Jennifer Massey
Woman
- Dylan James Turner Bratty Kid
- Sophia Blouin Flower Girl
- Stephen J. Downs Franklin
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Larry Joe Campbell
Best Man
- Mark Duane Anderson Secret Service Agent
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Irene Roseen
Elderly Woman
- Jules Mandel Rabbi
- Betsy Ames Betty
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Carson Elrod
Flip
- Joshua Wheeler Kip
- John G. Pavelec Ken
- Charles Kahlenberg Priest
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Kathryn Joosten
Chazz's Mom
- Karen Miller Chazz's Girlfriend
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Tanaya Nicole
Woman at Jewish Reception
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Naureen Zaim
Hindu Woman
- Cindy Taylor Girl at Irish Wedding
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Melanie Hawkins
Girl Who Cries
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Summer Altice
Girl Who Cries
- Lisa Beach Wedding Planner
- Lovelynn Vanderhorst Wedding Planner
- Phyllis Samhaber Woman at Table
- O.J. Watson Man at Table
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Al Cerullo
Helicopter Pilot
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Will Ferrell
Chazz Reinhold (uncredited)
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James Carville
James Carville (uncredited)
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John McCain
John McCain (uncredited)
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Lindsay Schoneweis
Woman in Hat (uncredited)
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Kelsey Wedeen
Bridesmaid (uncredited)
- Brian T. Lynch Funeral Mourner (uncredited)
- Joe Koons Irish Waiter (uncredited)
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Brie Garcia
Wedding Guest (uncredited)