Sienna Miller spotted with Christensen

Sienna Miller has been spotted kissing her Factory Girl on-screen-lover Hayden Christensen.

The pair were seen kissing on a romantic shopping trip, a source told The Daily Mail.

A friend of Miller explained how her relationship with the Star Wars star developed. "Hayden was a brilliant shoulder for Sienna to cry on when she finally split from Jude Law. Sienna is quite flirty and their friendship became something more."

"Hayden is besotted with Sienna but I'm not so sure that she totally reciprocates his feelings," she continued. "Ever since they stopped filming Factory Girl he has been calling and texting her - he thinks he is in love."

Now 24-year-old Miller is in Canada meeting Christensen's family, according to the 'paper.