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In the production of Monsters University (2013), several scenes and character moments were the result of improvisation. Unlike most animated films where actors record their lines in isolation, Pixar specifically utilized a collaborative recording process for this film to encourage spontaneous comedy.
The most significant source of improvisation in the film came from Billy Crystal (Mike) and John Goodman (Sulley). At Crystal’s insistence, the two recorded their lines in the same room together—a rarity in animation. This allowed them to "act" rather than just "read," leading to numerous unscripted moments:
Director Dan Scanlon has revealed that the character of Art was essentially "born out of laziness" in the writing room because they didn't initially know what his purpose was. This left a void for Charlie Day to fill with improvisation:
While Dean Hardscrabble is a stern character, her specific "voice" was found through a riffing process:
There was a specific scene actually titled "Drama Class" that was entirely centered on the concept of improv. In this deleted sequence, Mike and Sulley are forced to participate in an improv exercise where Mike plays a "flower" and Sulley plays a "bunny." While this was scripted as an "improv class" within the story, the actors were encouraged to lean into the awkwardness of the prompt to make the rivalry feel more authentic.
| Actor | Character | Improvised Detail |
|---|---|---|
| Billy Crystal & John Goodman | Mike & Sulley | General banter and "howabouts" throughout the film; specific "frantic" dialogue. |
| Charlie Day | Art | The line "I can't go back to jail!" and various non-sequiturs. |
| Helen Mirren | Dean Hardscrabble | The character's specific accent and "clicking" vocal affectations. |
| Bill Hader | The Slug | Some of the "late for class" vocalizations and panicked reactions. |
No oversights detected.
Yes, Monsters University features several improvised elements, primarily due to the collaborative recording sessions of Billy Crystal (Mike) and John Goodman (Sulley), who recorded together to allow for natural banter. Notable improvised or riffed elements include: