Hugh Hefner & Crystal Harris First Meeting Since She Called Off the Wedding

2/26/2012 12:35 PM PST

Hugh Hefner and Crystal Harris -- First Meeting Since Broken Engagement

It could have been awkward -- Hugh Hefner coming face-to-face with Crystal Harris for the first time since she canceled their wedding plans -- but it was quick and friendly ... sources tell TMZ.

As you'll recall, the 25-year-old Harris broke off her engagement to the 85-year-old Hef last June, just five days before they were set to walk down the aisle. 

According to our sources, a friend of Crystal's was invited to the Playboy Mansion last night and asked Crystal to tag along. Not wanting to create a scene, we're told Crystal phoned ahead to make sure it was all right ... and Hef said he would love to see her. 

Our sources say the meeting was brief -- a quick and friendly hello, not much more.

Maybe it is possible to be friends with your ex.