Mischa Barton Suffers A Nip Slip In Front Of Martin Sheen -- See His Hilarious Reaction

Awkward! Poor Mischa Barton had a warbrobe malfunction right in front of Martin Sheen at a Hollywood screening of Bhoptal: A Prayer for Rain.

On display! Barton looked classing in a crisp white button down. The only problem is there wasn't enough buttons.

Things got worse when Barton sat down and her shirt pulled away from her body revealing she had no bra on.

Barton must have felt a draft while wearing the plunging neckline blouse.

Martin Sheen didn't seem to mind the show. His facial expression is priceless!

Barton's probably wondering why no one gave her the heads up earlier on the red carpet.

Eye's up! Let's just pretend that didn't happen!