Robert Downey Jr. and his wife Susan welcomed a baby boy on Tuesday.

Robert Downey Jr

According to People magazine, the baby has been christened Exton Elias Downey. "Everyone is healthy and they couldn't be happier," Us magazine quoted a friend of the couple as saying.

The baby boy weighing 7 lbs., 5 oz., is 20 inches tall and joins big brother Indio, 18, Downey's son from his previous marriage.