Rivers Cuomo

Himself

Patrick Wilson

Himself

Brian Bell

Himself

Matt Sharp

Himself / Party Goer in "Undone" (voice)

Mikey Welsh

Himself

Scott Shriner

Himself

Karl Koch

Himself / Party Goer in "Undone" (voice)

Mykel Allen

Herself / Party Goer in "Undone" (voice)

Al Molinaro

Al Delvecchio ("Buddy Holly")

Casey Storm

Fonzie Dance Double ("Buddy Holly")

Henry Winkler

Fonzie ("Buddy Holly") (archive footage)

Tom Bosley

Howard Cunningham ("Buddy Holly") (voice) (archive footage)

Ron Howard

Richie Cunningham ("Buddy Holly") (archive footage)

Anson Williams

Potsie ("Buddy Holly") (archive footage)

Marion Ross

Marion Cunningham ("Buddy Holly") (archive footage)

Mary Lynn Rajskub

Pizza Delivery Girl ("The Good Life")

Tony Gracia

Groom ("Island in The Sun")

Steve Whitmire

Kermit the Frog / Statler ("Keep Fishin")

Eric Jacobson

Animal / Fozzie Bear / Miss Piggy ("Keep Fishin")

Dave Goelz

Gonzo / Waldorf ("Keep Fishin")

Bill Barretta

Pepe the King Prawn / The Swedish Chef ("Keep Fishin")