Daniel Radcliffe has ''something special'' with girlfriend Erin Darke.

The 'Harry Potter' actor - who split from his actress girlfriend of two years Rosie Coker in October - was spotted getting ''very intimate'' with his 'Kill Your Darlings' co-star at a party on Friday night (18.01.13) after the film's premiere at the Sundance Film Festival in Utah, and the pair are said to have ''something special''.

A source told The Sun newspaper: ''Daniel was really taken with Erin on set but is cautious about coming out and saying he's seeing someone before he knows it's something special.

''But he thinks now is the time to go public with the relationship.''

''They were getting very intimate at the party in a vodka lounge, kissing and with Daniel stroking her leg.

''He's usually not one for casual displays of affection so it obviously meant something.

''And when they left they were hugging and giggling.''

Daniel stars as controversial homosexual poet Allen Ginsberg in the forthcoming film - which is directed by John Krokidas - and the 23-year-old star is ''convinced'' his gay scenes will make him even more popular with women.

A friend said: ''John told him, 'I told you, girls were going to be into it'.

''That made Daniel smile even more and he's convinced the role will make him a hit with women.''