During an appearance on "Conan," she explained, "He's so affable and charming. It was incredible. We have lunch together, and he was trying to be funny…"
Biden tried to crack a joke with the former "Seinfeld" actress, saying, "Hey, does your husband like to sleep with the Vice President, because I'm trying to convince Jill it's a good idea!"
Badoom-ching.
"It's racy but he didn't mean it in a racy way," she explained. "He was just being funny."
After lunch, the actress rode with the VP in his motorcade.
"I had my phone, and so he took a picture of us," Julia recalled. "It's him taking it with my phone! It's a selfie. Isn't that neat?"
Watch Julia recount the story to Conan below: