(list.co.uk ) - Mischa Barton is dating Rooney guitarist Taylor Locke, it has been claimed.
The 22-year-old actress - who previously dated Whitestarr frontman Cisco Adler - publicly kissed Taylor at a memorial concert for filmmaker Brandon Schantz at Los Angeles' The Roxy Theatre last week.
An onlooker said: "Mischa was singing along and dancing as Rooney were playing. Literally as soon as they had finished she dashed over to the stage and gave him a big kiss on the lips. She was holding him around the waist and looked really happy."
Earlier in the day, Mischa and Taylor went for lunch together in West Hollywood.
Mischa, who has also dated oil heir Brandon Davies, recently explained she isn't interested in vain men.
The actress - who shot to fame playing Marissa Cooper in hit US TV show 'The O.C.' - said: "I'm really slow leaving in the morning because I'm lazy and easily distracted, and I also spend far too long looking in the mirror.
"It wouldn't be a good idea to have to share my life with a man who cares as much about his looks as I do about mine."