Jaden Smith may have ruined Justin Bieber's 19th birthday, but the 14-year-old has swag and a hot new lady love. The actor and rapper is dating Kylie Jenner, the younger half-sister of Kim Kardashian.

A source told Us Weekly that "they're dating" even though "they've been friends forever." The romantic relationship is new.

The couple had lunch at Cafe Nero in Piccadilly Square in London on March 3, offering some photographic proof that that things have heated up between them and sparking further chatter about their romance. They are both decked out in all black, bundled up in the cold, dreary, late winter weather. They are not all PDA'ed out, but there's some chemistry crackling in the pic above, don't you think?

Jenner has a thing for pop stars. Prior to hooking up with her "friend," the son of rapper/actor Will Smith, she was linked to Cody Simpson.

The Sisters Kardashian sure do like their musical men. Kim is expecting her first child with rapper Kanye West later this year. Maybe Smith can drop a few verses on Yeezy's next album, given the proximity and the Six Degrees of Kardashian.

Watch the Jaden Smith 'The Coolest' Video