Steve Martin
Stu Preissler
Jack Black
Brad Harris
Owen Wilson
Kenny Bostick
Brian Dennehy
Raymond Harris
Anjelica Huston
Annie Auklet
Rashida Jones
Ellie
Rosamund Pike
Jessica
Dianne Wiest
Brenda Harris
JoBeth Williams
Edith
Anthony Anderson
Bill Clemont
Corbin Bernsen
Gil Gordon
Barry Shabaka Henley
Dr. Neil Kramer
Joel McHale
Barry Loomis
Tim Blake Nelson
Fuchs
Jim Parsons
Crane
Kevin Pollak
Jim Gittelson
Nate Torrence
Ted Simkin
Steven Weber
Rick
Zahf Paroo
Prasad
John Cleese
Historical Montage Narrator (voice)
Paul Campbell
Tony
Cindy Busby
Susie
Greg Kean
Computer Birder
Eva Bourne
Birder's Daughter
Bill Dow
Dr. Paul Elkin
June Squibb
Old Lady
Craig Bockhorn
Lawyer
Joey Aresco
Frank Falucci
Ryan Caltagirone
Frank Jr.
Al Roker
New York Weatherman
Christopher Mann
Security Guard
Jan Bos
Local Newsman (High Island)
Kate Gajdosik
Local Newswoman (High Island)
William Samples
British Tourist
Scott Patey
Birder (High Island)
Marci T. House
Troop Leader
Michael Bean
Waiter
Christopher Redman
Scott
Devon Weigel
Karen
Andrew Wilson
Mike Shin
Gabrielle Rose
Mary Swit
Calum Worthy
Colin Debs
Doreen Ramus
CB Announcer
Terence Kelly
Pete Shackelford
Steve Darling
Anchorage Weatherman
Jon Frankel
Anchorage Anchorman
David James Lewis
Lanky Birder
Jesse Moss
Darren
Kath Dugray
Motel Manager
Morgan Brayton
Ferry Ticket Seller
Sheelah Megill
Nurse
Veena Sood
Nurse Katie
Dee Jay Jackson
Parking Attendant
Calvin Lee
Chinese Waiter
Tshering Garie
Chinese Waitress
Michael Karl Richards
Vicki's Fiancée (uncredited)
Stacey Scowley
Vicki (uncredited)