Conan O'Brien and David Letterman Sort of Trash Jay Leno on The Late Show

When David Letterman brought Conan O'Brien as a guest on The Late Show Thursday, you knew this was going to come up. And it was pretty amusing.

The two late-night talk-show hosts reunited on the program after 13 years, and Jay Leno, who famously forced Conan out of NBC, came up quite a bit.

Letterman didn't shy from admitting the rivalry brought him a bit of happiness, to which O"Brien, his one-time Late Night replacement, responded:

"If this is bringing you some measure of joy, then to hell with my career."

Letterman said Leno was always "a bit of a brat," and Conan confessed that the two comics had little in common, even back in the NBC salad days.

After some minor digs, Conan admitted he's in a good place, though.

"I feel terrific, I really do… I'm so very lucky to get to go on television and to get to do my thing my way, and TBS lets me do whatever I want."

"Checks come in and I have a great time. We took all of our people with us, everybody is happy. I'm thrilled. It worked out. I'm a lucky person."

"They don't watch it, they don't care."

We should all be so fortunate.