Dick Van Dyke, the "Mary Poppins" and "Chitty Chitty Bang Bang" actor, celebrated his 90th birthday on Saturday with a flash mob and sing-along at The Grove in Los Angeles, Calif. "I am very grateful that at 90 years old, I can still go out and play," Van Dyke wrote on Twitter, sharing a video of his epic birthday celebration.

The actor clapped and sang along as the flash mob, dressed as "Mary Poppins" characters, danced to songs including "Step in Time" and "Supercalifragilisticexpialidocious," which Van Dyke famously performed in the 1964 Disney musical, according to Entertainment Weekly.

Van Dyke eventually joined the crowd to sing "Let's Go Fly a Kite" from the film as they held up happy birthday signs. The actor's 90th birthday celebration was organized by his wife, Arlene Silver, and choreographed by Dena Spellman and Jenna Spellman, according to CNN.

Watch Dick Van Dyke's 90th birthday celebration below: