The actor first announced his wife's pregnancy on Twitter back in July and then followed up with another announcement on Facebook with the added words, "I don't know if it's a 'man's world,' but I'm certain women run it."
Girl Joy!! Avri Roel Downey, 7lbs, 20 in., 3:22 a.m. 11-4-14... Pretty like mama, and dimples like my uncle Jim!
— Robert Downey Jr (@RobertDowneyJr) November 5, 2014
Avri Roel joins her big brother, Exton Elias, who was born in February 2012. Downey Jr. also has a 21-year-old son from a previous marriage.
Recently, Downey Jr. shared sweet sentiments about having a daughter. According to eOnline.com, he revealed last month on Ellen, "I've heard that for dads, you grow a new heart valve when you have a daughter, and there's all sorts of new experiences and feelings and stuff."
And at a British awards ceremony last week, he explained how having a girl challenged his sense of certainty: "...You think you have much more of an understanding of what you're going to get. And this little soul lets herself be known to you, and it's just like: You don't know anything. It's great!"
Congratulations to the happy parents!
Horoscope for a Scorpio Baby
This post was updated on November 6, 2014 to reflect the name of the couple's daughter, plus Downey Jr.'s birth announcements.
Image: Robert Downey Jr. and wife Susan at the Los Angeles premiere of "The Judge" via Shutterstock