Mark Ruffalo's 23-year-old son could be his dad's clone in new photos

Mark Ruffalo shared photos of his 23-year-old son, Keen, and fans can’t get over their uncanny resemblance.

“Happy Birthday, Keen,” Ruffalo wrote on Instagram. “Love you so much and proud of all you have accomplished this year. Keep going.”

In his post, Ruffalo included throwback pictures of Keen as a little boy, as well as recent snaps — and there’s no denying that the “13 Going on 30” actor has strong genes. Both he and Keen have a thick head of curly hair and big brown eyes that seem to ooze kindness. At the moment, Keen is sporting a scruffy beard just like his dad.

Comments included:

  • “Wait, he cloned himself.”

  • “Your doppelgänger!”

  • “Wow, strong family genes.”

  • “He is literally you, Mark.”

Keen Ruffalo. (@MarkRuffalo via Instagram)
Keen Ruffalo. (@MarkRuffalo via Instagram)

Keen, who keeps a low-profile and appears to have deleted his social media, had brief cameos in some of Ruffalo's movies: "Begin Again" in 2013, and "Thor: Ragnarok" in 2017.

Mark Ruffalo with Keen Ruffalo. (@MarkRuffalo via Instagram)
Mark Ruffalo with Keen Ruffalo. (@MarkRuffalo via Instagram)

Ruffalo and his wife of 24 years, Sunrise Coigney, are also parents of daughters Bella, 19, and Odette, 16.

At Ruffalo’s Hollywood Walk of Fame ceremony earlier this years, he dedicated his star to Coigney.

“It’s for my wife Sunrise, who’s been with me through all of it,” Ruffalo said. “Who believed in me more than anybody.”

“You always tell the truth,” he added.

Ruffalo also praised his three kids for being the best teachers.

“You’ve taught me so much about being a parent, about being a man, about being an actor,” he said. “And this is your star, my whole family, in ways that you will not undestand for some time.”

In 2019, Ruffalo shared with People that his family enjoys snowboarding, cooking and gardening.

“I like those moments where you’re just chugging along and then, all of a sudden, your kids open up to you, and you have this deep conversation where they express their troubles— it’s hard for them, especially at that age,” he told the publication. “But my kids are way more savvy than I was, man. They’re so engaged in the world.”

This article was originally published on TODAY.com