After a run of hard partying at the Sundance Film Festival, “Spider-Man” leading lady Kirsten Dunst reportedly has checked into the Cirque Lodge treatment center in Park City, Utah, for undisclosed reasons.

The 25-year-old actress is said to be burst into tears when she signed herself in.

Almost  at the same time, Eva Mendes, who had been spending some time at the Cirque Lodge, has left the facility but will be back.

“Eva is attending to some personal business in Los Angeles and intends to return to complete her treatment shortly,” her rep said Thursday.

Cirque Lodge also has been home to Lindsay Lohan, who was treated last summer for substance abuse problems, and Mary-Kate Olsen, who logged time at the exclusive facility in 2004.