Robert Downey Jr. and wife Susan

Robert Downey Jr. and wife Susan welcomed their first child together on Tuesday, People reports.

Exton Elisa Downey was born at 7:24 a.m. in Los Angeles. He weighed in at 7 pounds, 5 ounces. This is the second child for the Iron Man star, who has an 18-year-old son, Indio, with ex-wife Deborah Falconer.

Robert Downey Jr.: We're having a baby boy!

In December, Downey revealed the sex of the child on The Tonight Show with Jay Leno. He joked that the pregnancy had actually been tougher on him than on his wife of six years. "Just the hormones and the mood stuff and the nausea and the whole thing," he said