Stillman, a heartbroken physics student, builds a time machine when his girlfriend breaks up with him. Going back in time, he attempts to save their relationship by fixing every mistake he made—while dragging his best friend along in the process.
Asa Butterfield
as Stillman
Sophie Turner
as Debbie
Skyler Gisondo
as Evan
Will Peltz
as Ryan
Aubrey Reynolds
as Blue Ribbons
Jillian Joy
as Carly
Joseph Park
as Andy
Caden J. Gregoire
as Kyle
Mary Elizabeth Boylan
as Sophia
Joey Miyashima
as Professor
