News Robert Downey Jr. Baby News! Published 9:57 AM PST, February 7, 2012 Getty Images ET confirms that Robert Downey Jr. and his wife Susan have welcomed a baby boy into the world.The Iron Man and Sherlock Holmes star's son Exton Elias Downey was born at 7:24 a.m. on Tuesday, Feb. 7 -- 20 inches long and weighing in at 7 lbs., 5 oz. Downey Had His 'Heart Set' on 'Sherlock' Scenes in DragAccording to People.com, a friend of the couple says, "Everyone is healthy and they couldn't be happier." Exton Elias joins big brother Indio, 18, Robert's son from his previous marriage. Congratulations!