Hugh Hefner and Crystal HarrisHugh Hefner is going down the aisle for a third time.

The Playboy founder, 84, popped the question to 24-year-old Playmate Crystal Harris over the holiday.

"After the movie tonight, Crystal & I exchanged gifts. I gave Crystal a ring. A truly memorable Christmas Eve," Hefner tweeted.

He later clarified, "Yes, the ring I gave Crystal is an engagement ring. I didn't mean to make a mystery out of it. A very merry Christmas to all."