Simon Cowell is dating Janina Gavankar.

The 53-year-old music mogul was spotted enjoying a dinner date with the True Blood actress - who plays shifter Luna Garza in the HBO series and looks very similar to his ex-fiancee - at Los Angeles restaurant Cecconi's on Saturday night, and the pair have been flirting on Twitter.

Last month, he wrote on the social networking site, "Hello trouble. Simon x." The 32-year-old beauty replied, "Who me?? #Definitely me. (sic)" The X Factor judge then responded, "yes you. x (sic)" Simon and Janina have since deleted the tweets from their accounts.

Janina - who dated US internet entrepreneur Angelo Sotira, 31, for five years before they split in 2010 - was spotted smiling in the back of Simon's chauffeur-driven car on Saturday.