Robert De Niro (b. 1943) is an Academy Award-winning actor. He has appeared on Sesame Street in a spot with Elmo in which De Niro displays his acting abilities for Elmo by imagining himself as a Muppet dog, cabbage, and a copy of Elmo. (EKA: Episode 3978)
When De Niro hosted Saturday Night Live in December 2004, Kermit the Frog appeared during his opening monologue and coerced him into singing a duet of "Have Yourself a Merry Little Christmas." When Kermit mistakenly sang the line "Make the yuletide gay" in the first verse instead of second, De Niro, following the teleprompter, correctly sang the non-rhyming "From now on, our troubles will be out of sight." Although the error was Kermit's, a witty consolation from the frog made it look like the mistake was De Niro's and elicited a laugh from the live studio audience. The second verse was sung without any mistakes.