Though debuting director Leslye Headland based “Bachelorette” on her same-named off-Broadway play that debuted years before “Bridesmaids,” it will inevitably be compared — unfavorably — to that phenomenon.

Less funny, more abrasive and more poorly paced than “Bridesmaids,” the film debuted late Monday night in Sundance’s premieres section.

Headland’s film centers on three basically unlikeable protagonists — a nasty control freak (Kirsten Dunst), a ditzy cokehead (Isla Fisher) and a snarky cokehead (Lizzy Caplan) — reunited for the wedding of an overweight former high school classmate (Rebel Wilson), the first in their group to get married.

Things quickly go bad when a stripper at her bachelorette party refers to the bride by her high school nickname of “Pigface.” Then the two cokeheads damage her wedding dress while trying it on — both at the same time.

In a plot line that recalls both “Bridesmaids” and “The Hangover,” these raunchy bad girls try to repair the damage in a long night filled with strip clubs, cocaine, a suicide attempt by Fisher and sex with Caplan’s ex-boyfriend Adam Scott. The main difference between “Bachelorette” and “Bridesmaids” is that the protagonists of the new film are a few years younger.

Headland — whose direction lacks the finesse of “Bridesmaids” director Paul Feig — says she doesn’t mind the inevitable comparisons.

“I look at it a little like ‘Bonnie & Clyde’ in 1967,” she told the Los Angeles Times. “You have a movie that gets everyone’s attention and all these comparisons are drawn, and they’re not always right. But then it’s like, ‘Thank God, let’s make more movies like that.’ “

The film, co-produced by Will Ferrell, is seeking a U.S. distributor.