Robert Downey Jr., wife expecting baby girl

Susan Downey and Robert Downey Jr. arrive at the LACMA Art + Film Gala on Saturday, Nov. 2, 2013 in Los Angeles. ((Photo by Jordan Strauss/Invision/AP))

"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.

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