Eric McCormack as Mark

Rafer Weigel as Robert

Audie England as Claire

William Shatner as Bill

Phil LaMarr as Eric

Thomas Hobson as Richard

Jennifer Sommerfeld as Tricia

Jonathan Slavin as Dan

Patrick Van Horn as Sean

Lori Lively as Leila

Holly Gagnier as Laura Hafermann

Deborah Van Valkenburgh as Marlena

Daniel Schweiger as Schweiger

Carl Bressler as Mort Berg

Joey D. Vieira as Hal Pittman

Spencer Klein as Young Robert

Ellie Cornell as Suzanne Crawford

Diana Cignoni as Illa

David Starzyk as Brian

Amanda Ingber as Munchkin Beth

Phyllis Franklin as Ticket Taker

Ethan Glazer as Young Mark

Stacy Rosman as Beach Babe Bimbo

Brandon Kleyla as Young Kevin

Marilyn Kentz as Gail - Mark's Mom

Dick Burnett as Dick the Bartender

Mickey Cassidy as Bully

Tricia Cruz as Mexican Waitress (as Letricia Cruz)

Annika Brindley as Astrid

Michael Altman as Eden Waiter

E.C. Burke as Eden Manager (as Eric Burke)

Andrea Evers as Cartoonsville Waitress

Austin Bates as Cartoonsville Boy

Dave Parker as Parker

Shawn Pelofsky as Jerry's Waitress

Keira De Anda as Menage Girl

Mark A. Altman as Cousin Ira

Mark Gottwald as Groover

Michelle Meyer as Outraged Patroness

Meika Cooper as Cafe Hostess

Harry Werksman as Harry

Gabrielle Stanton as Gabrielle

Randy Callahan as George

Alan Spencer as Obsessed Fan

Daren Dochterman as Tiberius

Dan Madsen as Alexander

Jon Baker as Rated's Back-Up Singer (as John Baker)

Freddie Rhone as Rated's Posse

Keith Lawson as Rated's Posse

Russell Young as Andrew

Tyler Binkley as Curly Blonde Kid

Jeff Bond as Additional Voices (voice)

Lukas Kendall as Additional Voices (voice)

Steven Melching as Additional Voices (voice)

Melissa Pokorski as Additional Voices (voice)

Paul Salamoff as Additional Voices (voice)