As the long-awaited release of Deadpool draws near, it's easy to start taking the widely praised Ryan Reynolds vehicle for granted. After all, this is a movie that very easily could have never happened. Remember how X-Men Origins: Wolverine totally played our guy Deadpool? Deadpool definitely remembers.

"It was the worst relationship I’ve ever been in," Reynolds told Jimmy Fallon on Tuesday, opening up about how the difficult process of bringing Deadpool to the finish line almost destroyed him. "On-again, off-again. Occasionally we sleep together and it just causes more pain. Then somehow, someway, we got married." Of course, that nice batch of test footage that mysteriously leaked back in 2014 certainly provided a much-needed boost.

"I know that one of us did it," Reynolds admitted. "There’s four of us: me, Rhett Reese, Paul Wernick, and Tim Miller. We all said at the beginning that someone should leak it, so the idea was planted." As for Reynolds' theory on which of the four is to blame for the leak that ultimately made Deadpool a reality, the actor is only vaguely certain he didn't just leak it on his own: "I'm 70 percent sure it wasn't me."