Not only are Sebastian Stan and Chris Evans part of the MCU, but they are also besties. "I wish you guys could know Sebastian," Evans said while doing press for "The Winter Soldier," per CBR. "He's the sweetest human being on the planet. He's such a good guy and he's so positive." Stan is equally as effusive about Evans. "I love Chris," he said. "He's awesome. He's an incredibly generous actor."

It's great that Stan and Evans are such good friends, but it might have been a bit awkward when Stan started dating Evans's ex just months after their fling ended. In February 2011, Evans went to the pre-Academy Awards Montblanc Cocktail Party. While there he met "Glee's" Dianna Agron, per Us Weekly. She was fresh off a split from Alex Pettyfer that happened, in part, because he was allegedly jealous of Agron's friendship with Stan. Evans and Argon dated for a couple of months.

In late May 2011, Stan and Agron started dating. They broke up in December but got back together in February. A few weeks later, they split for good. Ironically, considering how Agron's relationship with Pettyfer ended, they reportedly split because she was paranoid that Stan was cheating on her while he was out of town on a film shoot, per Us Weekly. See what we mean about Hollywood being a small town?

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