Annie Potts
as Bo Peep
Tony Hale
as Forky (voice)
Ally Maki
as Giggle McDimples (voice)
Lori Alan
as Bonnie's Mom
Wallace Shawn
as Rex
John Ratzenberger
as Hamm
Blake Clark
as Slinky Dog
Estelle Harris
Madeleine McGraw
as Bonnie
Emily Davis
as Billy/Goat/Gruff
Lila Bromley
as Harmony