Kirsten Dunst Checks Into Rehab

The story was broken yesterday:

Kirsten Dunst has checked herself into Cirque Lodge in Utah, Star has learned exclusively.

Spider-Man's Mary Jane made the decision to follow in the footsteps of Cirque patients such as Lindsay Lohan and Richie Sambora -- after a week of wild parties at last month's Sundance Film Festival. Fellow actress Eva Mendes is also in the mountaintop facility right now. Mary-Kate Olsen was treated at Cirque for food issues.

"She desperately needed help," a source in Utah tells Star. "She seemed to be intoxicated when she checked in because she was acting really erratic. She was extremely emotional, constantly breaking down in tears.

People magazine has new details:

"She's not doing well," the source says. "People were pushing her to go in there but there was no intervention... She has been partying hard for a while and I'm sure the Heath Ledger thing put people over the edge."

Adds the source, "She's been crying a lot lately, a lot built up. ...Everybody hits that bottom where you feel [so] scared that that one heavy night of partying can really wake you up. It's good she's getting herself help."