Which film featured Elon Musk in a cameo as himself in 2010?

Elon Musk appeared as himself in a cameo in the 2010 film Iron Man 2.

The Marvel superhero sequel stars Robert Downey Jr. as Tony Stark and was directed by Jon Favreau. Musk appears briefly at a party and speaks with Stark, reflecting the film’s interest in wealthy inventors, advanced technology, and futuristic engineering. The cameo helped connect Musk’s public image with the fictional world of high-profile industrial innovation.

Musk’s appearance is sometimes confused with the first Iron Man film or Iron Man 3, but his credited cameo was in Iron Man 2. He also had other screen appearances and references in entertainment, yet this remains the best-known feature-film cameo associated with him. The movie was released in 2010 and became the seventh-highest-grossing film worldwide that year.