Oh the memories!
The American Sniper star reminisced about hanging with Jimmy when he was just getting started on Alias when the host decided to one up him with a TBT pic their mutual friend Dax Shepard sent to him!
The nearly 15-year-old photo showed Cooper, Kimmel, and Shepard having quite the rousing party.
And by rousing we mean utterly depressing. LOLz!
Ch-ch-check out the nostalgic moment (below) to see how crazy these guys were back in the day!
[Image via ABC.]