Showbiz Spy reports: The actor celebrated turning 38 last month at The Darby in New York and blew the huge amount on alcohol for his friends.
“He and his crew spent $3 million on Armand de Brignac,” a source told America’s In Touch Weekly magazine.
“They ordered 18 cases, then requested more bottles!”
The party was attended by stars including Beyonce Knowles and her husband Jay-Z, Robert De Niro and Cameron Diaz.
Leo also used his big day to raise money for the Red Cross to help those affected by Hurricane Sandy by adding a fee to every bottle sold to be donated for charity.
Leonardo raised a total of $500,000 for American Red Cross, and all other donations went to charities supported by the Leonardo DiCaprio Foundation.