Colin Farrell and Vince Vaughn played "True Confessions" on "The Tonight Show."

In the game, players "take turns confessing to a random fact, then interrogate each other to determine who was telling the truth." And over the course of 9 minutes, a major secret was revealed: Colin Farrell is a delight! I had no idea. He had a great attitude from the beginning, when he hilariously realized the interrogation wasn't going to involve simple yes-or-no questions and then happily continued to field the other players' pressing inquiries. He also pulled out an impromptu impression of the guy from "The Jinx" and told a funny story about getting exonerated for a crime thanks to a friend's journal entry. In a perfect world, the game would have ended with Farrell revealing the biggest lie of all: that he's been faking his accent this whole time! That's definitely not true, but this video is still really fun to watch.

Sources: h/t Mashable