The Book of Love

Jason Sudeikis

Henry Herschel

Maisie Williams

Millie

Jessica Biel

Penny Herschel

Mary Steenburgen

Julia Mureaux

Orlando Jones

Dumbass

Richard Robichaux

Pascal

Paul Reiser

Wendell

Bryan Batt

Dr. Melvin

Jayson Warner Smith

Uncle

Christopher Gehrman

William Willis

Wendy Miklovic

William Willis' Wife

George Wilson

Dumbass' Dad

Joshua Mikel

Thor Heyerdahl

Russ Russo

David

Cailey Fleming

Nine-Year-Old Millie