Reps for Kirsten Dunst have hit back at allegations that she turned to drugs and alcohol after her split from Jake Gyllenhaal.

The 25-year-old actress was admitted to Cirque Lodge, in Utah, after a week of partying at last month's Sundance Film Festival.

Insiders close to the Jake told a U.S. publication that Kirsten’s wild ways were behind the couples split in 2005 after three years.

A source tells Us Weekly, "Jake was turned off by all the partying."

It was also claimed that “regret over the breakup led her to party more – and use cocaine and alcohol.”

A rep for Kirsten dismissed the split rumours as "downright wrong" and insist "she is not being treated for cocaine or any drug".