There's a pretty good chance you know all the shapes in a bowl of Lucky Charms – and that's thanks to Arthur Anderson.
He was hired to voice the mascot for Minnesota-based General Mills' new marshmallow-filled cereal back in 1963, and held the part until he retired in 1992, TIME says.
And the funny thing is, Anderson wasn't even Irish – he was born in New York to parents who immigrated from England and Denmark, he told ABC News back in 2005.
"I never got free cereal," Anderson told ABC News. "But they gave me lots of green money. And it was a fun character to play. Hardly a day goes by when somebody doesn't ask me to sing the Lucky Charms jingle, and I'm proud of that."
In a statement to BringMeTheNews, General Mills said it is saddened by Anderson's death, adding "For more than 50 years, generations of Americans have known that Lucky Charms are 'Magically Delicious!' and we have Arthur’s voice to thank for that."
Lucky Charms is still one of the best-selling breakfast cereals in the United States, according to Bakery and Snacks.
Playing a singing leprechaun wasn't Anderson's only credit: He made his Broadway debut alongside Orson Welles in "Julius Caesar", starred in films including "Midnight Cowboy" and "Zelig", and made appearances on TV shows, radio programs (listen to one of his most famous roles as Young Jim Hawkins on the Mercury Theater production of "Treasure Island" here) and other commercials, according to IMDB.
Anderson's friends and colleagues, including those at The Friends of Old Time Radio Convention Facebook page, have been paying their respects and sharing their memories of Anderson since his death.