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

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

— -- 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.