Hilton, 29, and Reinhardt, 24, broke up "weeks ago," her rep confirmed Thursday. "The relationship between Paris and Doug is over. She broke up with him more than two weeks ago."
The hotel heiress and Reinhardt had been dating for the past 14 months.
The couple ended their relationship once before, last June, but later reconciled.
Earlier this week, Hilton brushed aside buzz that she was getting cozy at a club with Kim Kardashian's ex-boyfriend Reggie Bush, writing on Twitter, "Aside from being @ the same club, Reggie and I didn't even say hi to each other. I was there with my sister and friends. "
Reporting by ELAINE ARADILLAS