The actors attended Walden School in New York and were high school sweethearts for a few years.

"It was so long ago...," Sedgwick told Watch What Happens Live! on Tuesday (29Nov16). "We went back and forth a lot."

"We went back and forth and (dated) for a few years after," Broderick added. "I know Kyra's mom, who is here. We know each other."

The Ferris Bueller's Day Off star also has a long history with Sedgwick's husband Kevin Bacon.

"I knew Kevin back before they married even," Broderick continued. "We started acting around the say time so we were constantly at readings or auditions together and I always liked him."

Broderick is now married to actress Sarah Jessica Parker.