Daryl Sabara as Benjamin Fiedler

Jami Gertz as Joanne Fiedler

Jeremy Piven as Adam Fiedler

Cheryl Hines as Casey Nudelman

Carter Jenkins as Zachary Stein

Sandra Taylor as Raylene Stein

Larry Miller as Arnie Stein

Doris Roberts as Rose Fiedler

Garry Marshall as Irwin Fiedler

Daryl Hannah as Sandy / Sacred

Britt Robertson as Ashley Grunwald

Miranda Cosgrove as Karen Sussman

Richard Benjamin as Ken

Adam Goldberg as Road Rage Driver

Bill O'Reilly as Self

Neil Diamond as Neil Diamond

Michael Leland Burton as Chair Lifter (uncredited)

Joseph Leo Bwarie as Noodleman's Assistant (uncredited)

Julius Callahan as Mr. Trailer Park Habitant (uncredited)

Jennifer De Minco as Undetermined Role (uncredited)

Allison Flashman as Casey's Assistant (uncredited)

Michael Molthen as Waiter (uncredited)

Becky Stockton as Sword Fight Witness (uncredited)