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Robert Downey Jr., Susan Downey

Jon Kopaloff/FilmMagic

The Stark stork has delivered: RDJ is a D-A-D!

Robert Downey Jr. and his wife Susan Downey welcomed their first child together in Los Angeles this morning, E! News confirms. And while the Iron Man papa already spilled the beans on the sex of his latest offspring (it's a boy!) months ago, they kept the little tyke's name secret up until today.

So what's the talented tot been dubbed?

Welcome to the world Exton Elias Downey!

Little Ex was born this morning at 7:24 a.m. As for his vitals, well, he's just as strapping as his old man, measuring up at 20 inches long and tipping the scales at 7 pounds, 5 ounces.

The newest addition to the Downey fam joins big brother Indio, Robert's 18-year-old son from a previous marriage.

Congrats all around!