Leonardo DiCaprio has sailed on the Titanic, battled grizzly bears in the brutal wild west, and explored dreams. Now, though, the 41-year-old actor says he’s going to travel to Mars — but for real.

Well, at least that’s what he told President Barack Obama.

DiCaprio was at the White House on Monday night as part of the South by South Lawn event. The actor, the president, and climate scientist Dr. Katharine Hayhoe took the stage towards the end of the evening for a conversation on climate change before the U.S. premiere of DiCaprio’s new documentary on the subject, Before the Flood.