Ashlee Simpson, Mandy Moore and Lindsay Lohan's ex, Wilmer Valderrama, has a new celebrity girlfriend - newly-single Avril Lavigne.

Just a month after filing for divorce from Canadian rocker Deryck Whibley, the 25 year old was spotted in actor Valderrama's arms in recent weeks.

One insider tells Life & Style magazine the couple enjoyed a romantic night out at Nobu in West Hollywood on 29 October (09).

And the pair went public with its romance at the weekend (14Nov09) at Los Angeles club Wonderland.

The source adds, "She had her hand on his knee and they were whisp ering in each other’s ear, laughing."