Paris HiltonCredit : Mike Coppola/Getty Images for American Heart Association

The fourth time's the charm for Paris Hilton after she said "yes" to her boyfriend, Carter Reum.

After one year of dating, the hotel heiress is now officially off the market after the M13 Ventures founder popped the question during her 40th birthday.

Moreover, the couple reportedly celebrated the blonde beauty's special day on a private island alongside her sister, Nicky.

Paris Hilton, Carter Reum's Engagement