Brittany Snow as Donna Keppel

Scott Porter as Bobby

Jessica Stroup as Claire

Dana Davis as Lisa Hines

Collins Pennie as Ronnie Heflin

Kelly Blatz as Michael

Johnathon Schaech as Richard Fenton

Ming-Na Wen as Dr. Elisha Crowe

Idris Elba as Detective Winn

James Ransone as Detective Nash

Shawn Driscoll as Officer Will

Brianne Davis as Crissy Lynn

Valeri Ross as Mrs. Hines

Jessalyn Gilsig as Aunt Karen Turner

Kellan Lutz as Rick Leland

Mary Mara as Ms. Waters

Allison Kyler as Dancer

Craig Susser as Officer Hicks

Linden Ashby as Uncle Jack Turner

Jana Kramer as April

Rachel Specter as Taylor

Lori Heuring as Mrs. Keppel

Jay Phillips as DJ Tyler

Joshua Leonard as Bellhop

Jennie Vaughn as Donna's Stylist

Kevin Gould as Prom Photographer

Tom Tarantini as Inmate

Charles Hirsch as Clerk

Brian Oblak as Businessman

David Kaufman as Businessman

Ross Partridge as Businessman

Jacqueline Herrera as Maid

Hugh Scott as New Clerk

Nicholas James as Denny Harper

Andrew Fiscella as Officer

David Lowe as Officer

Marcuis Harris as Reporter

Troy Blendell as Reporter

Gina St. John as Reporter

Nick DeMoura as Dancer

Morgan Nagatani as Dancer

Zena Foster as Dancer

Alex 'Shorty' Welch as Dancer

Katie Orr as Dancer

Anthony Clark as Dancer

Johnny Erasme as Dancer

Anthony Rue II as Dancer

Jennifer Talarico as Dancer

Tommy Kijas as Motorcycle Prom Kid (uncredited)

Bryan Carman as Parent (uncredited)

Kellen DeRuy as Viking (uncredited)

Joe Heath as Prom Photographer (uncredited)

Ken Hurst as Dancer (uncredited)

Krystal Katz-Page as Prom Goer (uncredited)

Kayla Laws as Dancer (uncredited)

Daphne Pe'a as Tiara Promgirl (uncredited)

Cory Rasmussen as Prom Attendee (uncredited)

Marciano Ricky as Cop (uncredited)