Hugh Hefner's Ex Crystal Harris Moves In With Dr. Phil's Son

Crystal Harris, the former Playboy Playmate who backed out of marrying Hugh Hefner at the last minute, was getting comfortable Friday with a new Los Angeles roommate -- Dr. Phil's son Jordan McGraw.

But the pair's relationship is strictly business -- for now, at least.

Harris and McGraw, both in their 20s, have been working on the model's debut album since she left Hefner heartbroken in June. The Arizona native has been staying at McGraw's home on and off for months, TMZ reported Friday, citing sources.

HOT SHOTS: Crystal Harris

Now, the pair has formalized the arrangement, and Harris has officially moved in to the Hollywood Hills pad.

The musicians said they are just friends, but neither would object if "something romantic unfolds," according to sources.

Harris caused a publicity storm when she dumped the Playboy mogul five days before their intended nuptials, then accused him of having a low libido during an interview with radio shock jock Howard Stern. She later apologized for that remark.