Did You Miss Boo’s Hidden Cameo in Toy Story 4?

Longtime Pixar fans are just now noticing that Boo from Monsters, Inc. makes a clever background cameo in Toy Story 4. The easter egg occurs during Bonnie's kindergarten orientation scene while she is busy creating Forky. 

If you look closely to the right of Bonnie's head, a blurry classmate in the background features Boo's unmistakable signature look, complete with her iconic pink shirt and dark twin pigtails. Eagle-eyed fans even spotted the same character model being reused later in the film's carnival scenes. 

While Pixar clearly placed this nostalgic nod in the movie on purpose, it is meant to be a fun visual easter egg rather than a piece of deep, official lore, especially since the fan-favorite "Pixar Theory" places the events of Monsters, Inc. in an entirely different era.