Robert Downey Jr., wife expecting baby girl

"Iron Man" star Robert Downey Jr. and his wife Susan are expecting a baby girl.

The actor, 49, tweeted the news Wednesday.

"Yo. Susan. Me. Baby. Girl. November. Scorpio?" the actor posted.

The baby is due in November.

Downey Jr. and his wife married in 2005, and together they are parents to son Exton, 2. Downey Jr.'s son Indio, 20, is from a previous relationship.