'Iron Man' Star Robert Downey Jr. and Wife Welcome Baby Girl

"Avri Roel Downey joined the party," the actor wrote on Facebook.

ByABC News
November 5, 2014, 12:21 PM
Robert Downey Jr. and his wife Susan Downey arrive for a movie premiere in Beverly Hills, Calif. on Oct. 1, 2014.
Robert Downey Jr. and his wife Susan Downey arrive for a movie premiere in Beverly Hills, Calif. on Oct. 1, 2014.
Mark Ralston/AFP/Getty Images

— -- Robert Downey Jr. and his wife Susan have welcomed a baby girl, the actor shared on Facebook today.

"After 9 months of intensive development, Team Downey is pleased to announce our 2014 fall/winter project. Principal photography commenced 11-14 and will continue until she says, 'Dad! You are embarrassing me...I'm 30, this has gotta stop.'"

He continued, "Yep...Avri Roel Downey joined the party @ 3:22 a.m. on November 4th...she's 7lbs even, spans 20 inches, and is accompanied by a variety of Susan's traits that have seemingly overwritten my 'junk DNA.' I'll post pics here + there when I'm not too busy staring..."

The new daughter joins Downey and his wife's son Exton, 2, and the actor's son Indio, 21, from a previous relationship.

The "Iron Man" star, 49, announced the pregnancy in July on Twitter, writing, "Yo. Susan. Me. Baby. Girl. November. Scorpio?"

He followed that up with a post on Facebook, saying "Um. I don't know if it's a "man's world", but I'm certain women run it. Susan and I are therefore delighted to announce we are expecting a baby. Girl."

Downey Jr. and his wife married in August 2005.

It's been an exciting few weeks for Downey, who was part of some huge Marvel news at the end of October.

Marvel Studios announced nine new movies, including "Captain America: Civil War," which will star Downey and Chris Evans.