A wedding crasher ruined a couple’s big day when she hurled a drink at guests and got involved in a bridesmaids brawl, police said.

Shelby McDowell, 20, was arrested Sunday night after she showed up uninvited to spy on a guest she claimed was her boyfriend at a wedding in Palm Coast, Florida, according to news station WKMG.

McDowell claimed, upon arriving at Hammock Beach Resorts, that she saw her boyfriend, Darby Johns, dancing with and kissing a woman on the dance floor.

She then poured a drink on the pair, punched the woman in the face and made a break for the bathroom, according to authorities.

Several bridesmaids, however, decided to take matters into their own hands and dragged McDowell out of the bathroom stall, according to WKMG.

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