Kirsten Dunst’s bizarre behaviour of late has apparently sparked fears that the actress is heading for a Britney Spears -style meltdown.

A U.S. website cites Kirsten’s “erratic” appearance at the Sundance Film Festival as a possible warning sign that all is not well with the Spiderman actress.

The New York Post reports:

KIRSTEN Dunst's strange ways have tongues wagging that she's "on the verge of a breakdown." The starlet came late, left early, and "acted erratic" during a recent event at Sundance, according to insiders. The source added that friends of the actress made apologies on her behalf, saying, "Kirsten is not in a good place right now."

Her rep responded to the claims by insisting, "Kirsten is fine."

Kirsten was spied "making out like crazy" with Josh Hartnett after watching a performance by supergroup Camp Freddy at the Utah event - which sounds like the normal, healthy behaviour to us.