'The O.C.' Mischa Barton Nip Slip [PICS]: Marissa Cooper Wardrobe Malfunction Next to Martin Sheen

Mischa Barton of The O.C. can never catch a break, can she? The one-time Hollywood "it girl," who has since fallen from grace, experienced a new level of humiliation as she had a little wardrobe malfunction over the weekend. While the 29-year-old actress, who played Marissa Copper on the show, was attending a screening of Bhopal: A Prayer for Rain, Adam Brody and Ben McKenzie's former co-star experienced a nip slip, and it was documented in photos for the world to see. According to Radar Online, the starlet didn't just feel the breeze on her exposed nipple during the screening of her movie, but also while she was hitting the red carpet beforehand. The starlet wore a white, button-down blouse without a bra underneath, which was her first mistake. It seems she shouldn't have decided to unbutton that bottom button. But the matter was made worse when Barton sat down next to her co-star Martin Sheen as her shirt opened up even more.

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A photo posted by @mischamazing on Nov 12, 2014 at 2:09pm PST

The news site posted a slideshow of pictures where it looks like Sheen spots the exposed areola, and his face is literally priceless.

Click here to view the pictures.

E! News is also reporting on the unfortunate incident, also pointing out Sheen's hilarious face when he discovers the exposed breast.

The news site also explained the premise of Bhopal, which stars Sheen and Barton. The flick tells the story of an industrial disaster in India during 1984. The picture will tell the story of these two interweaving characters, as they interact in the United States and India before and after the tragic incident.