It's no secret that Mark Ruffalo [1] and Noah Centineo share some similar physical attributes [2]. Well, apparently it's a secret to Mark, because he doesn't seem to understand why so many people have compared him to the 22-year-old actor [3]. On Wednesday's episode of The Tonight Show Starring Jimmy Fallon [4], Mark addressed all the hoopla surrounding him and his young doppelgänger. When Jimmy pulled out a photo of Noah, the Avengers: Endgame [5] actor looked pretty taken aback. "He's way better looking than I was, are you kidding me?" he said. "I wish I looked like that, I swear to God." (Yep, even Mark knows how hot Noah is [6].) That's when Jimmy unearthed an old picture of Mark when he was 15 years old, and it's hard to deny that he definitely looks like one of Noah's relatives.