Joel Ryan / Invision/AP 1 / 6
Joel Ryan / Invision/AP 1 / 6

Leonardo DiCaprio has reportedly agreed to testify against a woman who stands accused of slashing his face with a glass at a party in 2005.

The "Titanic" star is said to have been "extremely cooperative" with lawyers prosecuting 40-year-old Aretha Wilson and is even willing to take the stand and face her in court, reports

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Wilson is alleged to have hit the actor during a Hollywood Hills house party thrown by Paris Hilton's ex-boyfriend, film producer Rick Salomon. Following the party, DiCaprio reportedlyneeded 17 stitches to close up a large cut across his face.

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Wilson was ordered to stay at least 500 yards away from the actor after she appeared in court on Wednesday (04Aug10).

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Her arraignment has been postponed until Aug. 11.