By Breaking Celebrity News Staff

Looks like Kirsten Dunst is done keeping her new romance on the down low!

The Melancholia actress, who has been spotted out and about with hunky actor Garrett Hedlund for months, but has yet to comment on their relationship status, flaunted her flame in front of partygoers at Day 4 of T-Mobile Presents Google Music at Tao on Monday night at the Sundance Film Festival

in Park City – and Breaking Celebrity News has a video of the hot new couple and exclusive details about their PDA fest!

“They were making out all night long,” an eyewitness tells Breaking Celebrity News exclusively. “They were attached at the hip the whole night and it was obvious to everyone that they were an item.”

And we even have proof!

Though Kirsten and Hedlund did not take any photographs together at the star-studded event, Breaking Celebrity News has obtained a video of the couple on the dance floor, looking extremely cuddly and adorable as Kirsten’s pal Sam Ronson spun tunes from the DJ booth.