Don’t invite Mischa Barton and Paris Hilton to the same party. A catfights have broken out between the star of “The O.C.” and the partying heiress.

Barton lashed out when a reporter asked her about Hilton during a party after the British awards show, BAFTA.

“Paris isn’t my rival,” Barton told the London Mirror. “I met her one or two times and she’s making out there’s this big rivalry between us and there so isn’t.”