2008 animated film with the tagline "He's got a monster of a problem"

I believe the answer is:

igor

(Other definitions for igor that I've seen before include "-- Stravinsky, composer" , "Stravinsky's first name" , "Stravinsky, for example" , "Prince of grand opera" , "Prince --, opera by Borodin" .)

I've seen this clue in The New York Times.

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