Cast of Happy Death Day

Jessica Rothe plays the main character, Theresa 'Tree' Gelbman.

Israel Broussard portrays Carter Davis, Tree's ally in solving the mystery.

Ruby Modine plays Lori Spengler, a friend of Tree's who becomes involved in the time loop.

Rachel Matthews portrays Danielle Bouseman, a sorority sister and potential suspect in the mystery.

Billy Slaughter plays Dr. Winter, a character involved in Tree's repeated experiences.

Charles Aitken portrays Gregory Butler, a character connected to Tree's time loop.

Jimmy Gonzales plays a Police Officer in the movie.

Jason Bayle portrays David Gelbman, Tree's father.