Suggestions by @kazpalys

Amy Schumer

as Gummy Bear in IF 2

Maya Rudolph

as Ally in IF 2

Sam Rockwell

as Guardian Dog in IF 2

Matthew Rhys

as Ghost in IF 2

Christopher Meloni

as Cosmo in IF 2

Sebastian Maniscalco

as Magician Mouse in IF 2

Allyson Seeger

as Viola in IF 2

Blake Lively

as Octopuss in IF 2

John Krasinski

as Marshmallow in IF 2

Mat Kearney

as Runway in IF 2

Keegan-Michael Key

as Slime in IF 2

Richard Jenkins

as Art Teacher in IF 2

Bill Hader

as Banana in IF 2

Matt Damon

as Flower in IF 2

Bradley Cooper

as Ice in IF 2

George Clooney

as Spaceman in IF 2

Emily Blunt

as Unicorn in IF 2

Awkwafina

as Bubble in IF 2

Louis Gossett Jr.

as Lewis in IF 2

Phoebe Waller-Bridge

as Blossom in IF 2