The former star of "The Office" dropped by the daytime chat show to promote his animated film "Despicable Me 2," set for release July 3.
Wearing a bald skull cap, fat suit and scarf, Carell told DeGeneres in his Gru voice: "It's so good to be here. I've never been on television. What a crowd!"
Carell as Gru joked about the only occasion on which he'd previously met DeGeneres.
"The one time I stood behind you in line at the Starbucks," he said.