"The Tonight Show" / . 1 / 23
"The Tonight Show" / . 1 / 23

Who can blame Robert Downey Jr. for wanting to show off his adorable baby boy?

On "The Tonight Show With Jay Leno" Thursday, Downey, 47, revealed the first photos of his 8-week-old son, Exton Elias, his first child with producer wife Susan, 38. (He's also father to son Indio, 18, from a previous relationship.)

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The "Avengers" actor initially played coy about sharing the images, telling host Jay Leno, 62: "I would get in huge trouble. I have to exercise just a little restraint. I'm sorry. I mean ... if you want me to, I will."

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After the first photo of Exton and Susan was unveiled, Robert gushed: "He's so darn cute, isn't he? You get one, that's it. Unless of course you want to see the other one."

With that, Downey proudly showed off a second solo shot of Exton. In it, the newborn wore orange pants and a striped hooded sweatshirt.

Before Exton Elias' birth, Robert was nervous about becoming a father again. "There was all this trepidation, all this projection, all this anticipation and goodwill and a good vibe about it," he said in the May issue of Esquire. "But what you're squeezing to the side -- or what's in the glove box -- is these thousands of forms of fear. And then he was born and they've all just kind of scattered now. It seems like he's always been here."

This article originally appeared on Usmagazine.com: FIRST LOOK: Meet Robert Downey Jr.'s Son Exton Elias!