Drew and Justin coy over rumours
Drew Barrymore and Justin Long have refused to confirm that they are dating.
The pair, who star in new movie Going The Distance together, are reported to have had an on-off relationship for the past few years.
But at V Festival in Chelmsford - where Drew is rumoured to have an entourage of 25 people - she told Absolute Radio's Geoff Lloyd: "We prefer mystery."
And when the DJ suggested the pair would make good "friends with benefits", Justin merely said: "Well thank you, Geoff."
Drew chuckled: "I appreciate your assessment!"
The A-lister also joked that she had started stalking a band - the Mercury Prize-nominated The XX.
"I'm a little psycho for The XX - I really stalk them," she said.
But she said that when she met the band, it could have gone better.
"I of course went overboard, as I usually do, and I think when you go overboard with shy people it doesn't always go great," she said.
"I tend to (scare people) with my enthusiasm, and it's coming from such a genuine place, but they don't know me so they don't know. They just think I'm crazy, but at least they know how much I love their music."