
Alexander's day begins with gum stuck in his hair, followed by more calamities. Though he finds little sympathy from his family and begins to wonder if bad things only happen to him, his mom, dad, brother, and sister all find themselves living through their own terrible, horrible, no good, very bad day.

as Ben Cooper

as Kelly Cooper

as Alexander Cooper

as Anthony Cooper

as Emily Cooper

as Baby Trevor

as Baby Trevor

as Becky Gibson

as Celia

as Nina

as Paul Dumphy

as Philip Parker

as Elliot Gibson

as Mrs. Gibson

as Audrey Gibson

as Mr. Rogue

as Steph

as Yoga Instructor

as Mr. Cellars

as Mr. Tonucci

as Receptionist Abby

as Captain Hook

as High School Teacher

as Video Game Receptionist

as Greg

as Logan

as Joaquin

as Video Game Exec Yoshi

as Mr. Brand

as Bookstore Employee

as Pharmacist

as Dwayne

as Jimmy

as Ms. Suggs

as Tux Shop Employee

as Actor John Darling

as Actor Wendy Darling

as Heather

as Thunder from Down Under Dancer

as Thunder from Down Under Dancer

as Thunder from Down Under Dancer

as Security Guard

as Nagamaki Host

as Stage Hand

as Pregnant Sheila

as Audrey's Friend (uncredited)

as Dick Van Dyke (uncredited)