Baby Girl on the Way for Robert Downey Jr.

Third time’s the charm for Robert Downey Jr.

He and wife Susan are expecting a daughter this fall, he announced via Twitter on Wednesday.

“Yo. Susan. Me. Baby. Girl. November. Scorpio?” the actor, 49, wrote. PEOPLE confirms the happy news.

The Avengers star and his producer wife, 40, are already parents to son Exton Elias, 2½. Downey is also dad to 20-year-old son Indio (who was arrested for cocaine possession last week) from a previous relationship.

The Tweet is a departure from Downey’s last pregnancy announcement, when he accidentally blurted out Exton’s sex during an appearance on The Tonight Show, later joking, “I think actually it’s been tougher on me. Just the hormones and the moods and stuff and the nausea, and the whole thing.”

Though he plays Iron Man on screen, Downey told Esquire in 2012 that he doesn’t want to seem superhuman to his kids.

“Do I want to be a hero to my son? No. I would like to be a very real human being. That’s hard enough. … Hero to me is not applicable to the human experience.”