Hollywood star Matt Damon will never forget his senior prom night - because he witnessed his date sleeping with another man.

THE Bourne Supremacy actor brought high school love TAMMY JONES - who is currently engaged to former BOSTON CELTIC basketball ace DEE BROWN - to the end-of-school dance and was upset when she moved on to her ex-boyfriend that night at their post-prom party in Cape Cod, Massachusetts.

Damon tells the American edition of COSMOPOLITAN magazine, "It was terrible.

"Her sister told me to sleep in this lounge chair. My girlfriend and the guy jumped into the bed next to the chair and for the whole night, I was at the foot of the bed while they were hooking up. I didn't have a car... I was stuck there."

07/10/2004 13:44