Robert Downey Jr. and his wife Susan are the proud new parents of a baby boy. Exton Elias Downey — another addition for the book of odd celebrity baby names — was born at 7:24 this morning in Los Angeles, weighing in at a healthy 7 lbs., 5 oz. This is their first child together, the second for Downey Jr. who is father to 18-year-old Indio, his son from a previous marriage. When the couple announced the pregnancy in the summer, the actor spilled the beans about the sex of the baby, despite his wife’s wishes to keep it quiet. When people tried to find out what they’d picked for a name, he was careful about keeping his mouth shut. “If I told you the name, then she would lop off my head with a machete,” he joked. Downey Jr. can next be seen starring alongside Scarlett Johansson, Samuel L. Jackson, and Chris Evans in the superhero action flick, The Avengers, which hits theaters May 4.