Mischa Barton’s Run-In with Cisco Adler

This year’s SXSW festival was jam-packed with all kinds of celebrities, and unfortunately for Mischa Barton, Cisco Adler was one of them.

According to a report, the “Beautiful Life” babe ran into her ex-boyfriend while partying at a Spin Magazine fete on Friday night.

And neither of them was willing to let bygones be bygones and just enjoy the shindig, according to an eyewitness.

"You could tell they were both surprised and annoyed that the other party was there. They were totally avoiding each other."