Mischa Barton says she is a "serial monogamist".

The actress is currently happily dating Sebastian Knapp. Mischa insists she doesn't fall in love quickly, although she will commit to someone if she feels they are the right person for her.

"Hmmm, no," she said when asked about falling in love quickly.

"But I am a serial monogamist. I don't date easily at all but if I meet someone I do always seem to end up dating them long-term."

Mischa recently unveiled her new boutique clothing store. The star launched the flagship shop in London, and says her beau is very supportive of her fashion dreams.

"Incredibly so. He's great. I was like, 'You don't have to come to the store opening. You don't have to do anything.' But he said, 'No, I'm coming to support you,'" she revealed in an interview with the British edition of OK! magazine.