(Cover) - EN Showbiz - Crystal Harris is keeping her engagement ring from Hugh Hefner.

The 25-year-old Playmate model was expected to marry Playboy magazine founder Hugh, 85, last Saturday in a highly-anticipated ceremony. However, just five days before the nuptials, it was revealed Crystal had moved out of the Playboy mansion and called off the wedding.

Crystal, who partied with Heidi Montag in Las Vegas on the day of the cancelled wedding, visited her former fianc on Sunday to return the $90,000 engagement ring she was given.

"It was the right thing to do," Crystal told RadarOnline.com about wanting to return the ring.

However, after her visit to the Playboy mansion, Hugh urged her keep the impressive sparkler, along with the Bentley he had bought for her too.

Crystal also returned the couple's King Charles dog, Charlie. Hugh took to his Twitter page to express his relief at getting his pet pooch back.

"Crystal brought Charlie back because she thinks he's happier here," he wrote. "I appreciate it, because I really missed him."

Hugh has taken the shock break-up well. The mogul insists that he will always have a close bond with his former beau.

"Crystal came by to see how I've been doing," he Tweeted on Sunday. "We remain close friends."

Hugh and Crystal began dating in January 2009 and announced their engagement in December. This would have been Hugh's third marriage. (C) Cover Media