Scarlett Johansson and Chris Evans, name a better duo. The two actors and real-life friends have crossed paths on-screen in quite a few films over the years. And something undeniable during all of that screen time is the fact that Johansson and Evans share a chemistry that's palpable. Most notably, Johansson and Evans starred in the Marvel Cinematic Universe as Natasha Romanoff/Black Widow and Steve Rogers/Captain America respectively. But their roles in movies together and their friendship goes back at least a decade.