13 Going On 30 Cast

Jennifer Garner - Jenna Rink
Mark Ruffalo - Matt Flamhaff
Judy Greer - Lucy Wyman
Andy Serkis - Richard Kneeland
Kathy Baker - Bev Rink
Phil Reeves - Wayne Rink
Samuel Ball - Alex Carlson
Marcia DeBonis - Arlene
Christa B. Allen - Young Jenna
Sean Marquette - Young Matt
Kiersten Warren - Trish Sackett
Joe Grifasi - Mr. Flamhaff
Mary Pat Gleason - Mrs. Flamhaff
Susan Egan - Tracy Hansen
Lynn Collins - Wendy
Renee Olstead - Becky
Alexandra Kyle - Young Tom-Tom
Alex Black - Young Chris Grandy
Ashley Benson - Six Chick
Brittany Curran - Six Chick
Brie Larson - Six Chick
Megan Lusk - Six Chick
Julia Roth - Six Chick
Jeffrey Shane Cohn - Grandy's Friend
George Hine - Grandy's Friend
Philip Pavel - Phil
Sarah Loew - Carla
Maz Jobrani - Glenn
Ian Barford - Pete Hansen
Benita Krista Nall - Waitress at Party
Robinne Lee - Rachel
Justin Burke - 13-Year-Old Boy in Bar
Sara Swain - Sara
Catherine Combs - Catherine
Gina Mantegna - Gina
Sydni Beaudoin - Sydni
Jim Gaffigan - Chris Grandy
Corzna Chase - Poise Employee (as Corena Chase)
Crystal Michelle - Poise Secretary
Madeline Sprung-Keyser - Maddy
Richard Whitebear - DJ (as Swoop Whitebear)
Shambo Pfaff - Band Member
John W. Grant - Band Member (as John Grant)
Fabrice Calmettes - Band Member
Eron Otcasek - Band Member
Kevin D. White - Yearbook Photographer
Timothy Anderson - Dancer
Adrian Armas - Dancer
Carmit Bachar - Dancer
Rita Bland - Dancer (as Rita Maye Bland)
Douglas Caldwell - Dancer
Keith Diorio - Dancer
Nadine Ellis - Dancer
Janina Garraway - Dancer (as Janina N. Garraway)
Stacey Harper - Dancer
Brandon Henschel - Dancer (as Brandon Nicholas Henschel)
Michael William Higgins - Dancer
Katie Miller - Dancer
Nancy O'Meara - Dancer
Bubba Dean Rambo - Dancer
Caroline A. Rice - Dancer
Kevin Alexander Stea - Dancer (as Kevin Stea)
Michon Suyama - Dancer
Kadee Sweeney - Dancer
Natalie Willes - Dancer
Darrel W. Wright - Dancer (as Darrel Wright)
Kimberly Wyatt - Dancer
Jason Yribar - Dancer
rest of cast listed alphabetically:
Jason Makely - Magazine Staffer
Amber Gristak - Rude Girl (uncredited)
Ward Horton - Featured extra (uncredited)
Bill Kotsatos - Photo Shoot Grip (uncredited)
Melody Krell - Magazine Editor (uncredited)
Luis Pedron - Matt's Photo Assistant (uncredited)
James Pomichter - Guy Hit by Shrimp (uncredited)
Shannon Slapp - Thriller dancer (uncredited)
Stewart Summers - Businessman (uncredited)
Brad Tiemann - Magazine Staffer (uncredited)
Larry Vigus - Guest (uncredited)