Those Park City temperatures must be getting the best of Daniel Radcliffe – the young star was seen cuddling up with one of his latest co-stars!In town for the Sundance Film Festival with the drama "Kill Your Darlings,” Radcliffe and cast toasted at Grey Goose’s chic Blue Door Lounge on Main Street Friday.Erin Darke, who plays Gwendolyn in the film, was spotted arm-in-arm with Radcliffe, even stealing a few kisses according to People.An omg! source confirms they were being affectionate but "not too crazy,” and that Daniel was in a very jovial mood."He was the last to leave, and so happy,” the source said of Daniel, who showed off some dance moves and enjoyed cocktails through the evening.Agencies