IF

Cailey Fleming

as Bea

Ryan Reynolds

as Cal

John Krasinski

as Dad / Marshmallow (voice)

Fiona Shaw

as Grandmother

Steve Carell

as Blue (voice)

Phoebe Waller-Bridge

as Blossom (voice)

Louis Gossett Jr.

as Lewis (voice)

Alan Kim

as Benjamin

Liza Colón-Zayas

as Janet

Bobby Moynihan

as Jeremy

Catharine Daddario

as Bea’s Mom

Audrey Hoffman

as Bea (Ages 3 & 5)

Laquet Sharnell Pringle

as Receptionist

Ed Herbstman

as Deli Guy

Barbara Andres

as Woman Upstairs

Alexander Rivero

as Custodian

Shauna Pinkett

as Hospital Receptionist

Sa'Raya Paris Johnson

as 7 Year-Old Girl

Marta Siteiya Moipei

as Coffee Shop Barista

David Weissmann

as Young Jeremy

Awkwafina

as Bubble (voice)

Emily Blunt

as Unicorn (voice)

George Clooney

as Spaceman (voice)

Bradley Cooper

as Ice (voice)

Matt Damon

as Flower (voice)

Bill Hader

as Banana (voice)

Richard Jenkins

as Art Teacher (voice)

Keegan-Michael Key

as Slime (voice)

Blake Lively

as Octopuss (voice)

Sebastian Maniscalco

as Magician Mouse (voice)

Christopher Meloni

as Cosmo (voice)

Matthew Rhys

as Ghost (voice)

Sam Rockwell

as Guardian Dog (voice)

Maya Rudolph

as Alligator (voice)

Amy Schumer

as Gummy Bear (voice)

Allyson Seeger

as Viola (voice)

Jon Stewart

as Robot (voice)

Craig 'Radio Man' Castaldo

as Radio Man (uncredited)

José Garcia

as (voice) (uncredited)

Mylène Farmer

as (voice) (uncredited)

Marina Foïs

as (voice) (uncredited)

Clément Remiens

as (voice) (uncredited)