The British-born beauty made a statement on the red carpet in New York on Thursday evening (26 September), as she walked the black carpet at a screening for the Showtime series.
Mischa teamed her satin-look gown with a white cardigan. Perhaps it was a chilly night in NYC?
It's probably not a look that would look on everybody but we reckon gorgeous Mischa can definitely pull it off.
Mischa finished her look with a statement gold necklace, small box clutch, subtle make-up, radiant skin and straight, glossy hair.
The 27-year-old has kept a relatively low profile lately, but has several projects in the pipeline, including action thriller Homefront, which co-stars Jason Statham and James Franco.
One project that she definitely doesn't have in the works, however, is an OC reunion.
Mischa recently told HuffPost Live that she isn't interested in a reunion, pointing out that, firstly, her character, Marissa Cooper, is dead.
"At the end of it, I was very much ready for closure on the character and on the series" she said. "I don't think there's much that you could do with that storyline anyway now, especially since I'm dead…"
We're sure there are plenty of OC fans who wouldn't mind seeing the writers try!