Russell Brand has moved on from Katy Perry with a mystery woman.

The 36-year-old actor - who filed for divorce from the "One That Got Away" hitmaker in December, citing irreconcilable differences - was spotted dropping a brunette beauty back at her apartment after she spent the night at his new Los Angeles home following a date at The Largo Theatre.

"Russell is a single man again and starting to move on from Katy. Like any guy, he had missed female company. He isn't quite back to his old ways yet, but he's very much back in the saddle," a source told The Sun.

Russell - who was known for his womanizing ways prior to meeting Katy - has reportedly been moving on from the former couple's 14-month marriage with more than one woman much to the shock of the "Firework" singer. "Katy discovered through her friends. One of the women told a friend of hers and it got back to Katy," an insider said.

Despite Russell being legally entitled to half Katy's $44 million fortune, he is believed to have told her he doesn't want anything from her and wants their split to be as amicable as possible.