Mischa Barton at Matthew Williamson opening, part one

With her hair flowing and looking beautiful, Mischa Barton appears pretty happy while attending Matthew Williamson’s New York store opening Sunday.

Expect to see a lot of Mischa this week as New York Fashion Week takes off.

Mischa’s been pretty busy the last few days. She spent Valentine’s Day in New York with beau Luke Pritchard from The Kooks. Here’s a few photos with Pritchard.

More photos after the jump: