Kirsten and Josh Hartnett have fuelled speculation they’re romantically involved after the couple was spotted kissing at the Sundance Film Festival. The stars were watching a performance by supergroup Camp Freddy at the Park City, Utah event when they stunned revellers with a public display of affection after the gig. A source tells U.S. publication People, “They were making out like crazy.” Hartnett has recently been romantically linked to beauties including Rihanna and Scarlett Johansson.