There's absolutely no denying that the chemistry between American Idol judges Katy Perry, Lionel Richie, and Luke Bryan, and host Ryan Seacrest is infectious. The camaraderie between the four stars makes ABC's reality singing competition show so much fun to watch. As it turns out, there's a reason why they all get along so well — they're actually friends IRL.

That's right. The fun personalities, who come alive on TV, all knew each other before the 2018 Idol reboot. Keep scrolling to see Ryan, Lionel, Katy, and Luke through the years!