12/14/2007 at 03:00 PM EST
John Mayer and Minka Kelly have quietly called it quits after a brief romance.
The musician, 30, and the 27-year-old Friday Night Lights
actress split over a month ago, but are "still friends," sources tell PEOPLE.
Despite their split, the two have remained close: Kelly showed her support for Mayer at his December concert in L.A. and accompanied him to the after-party at Parc where they got cozy in a booth together. The two were also spotted days later having breakfast in L.A. and also drinks at The Sunset Marquis Hotel in West Hollywood.
According to a pal of Kelly's, "Minka told a couple friends that she and John had broken up but she really didn't want to tell anyone."
The couple became involved earlier this fall. They were spotted dining together several times in Austin, Texas, in early October and again later that month in California. They also met up with Chris Ivery and Ellen Pompeo at a Knicks game in New York in November.
The split, however, may not last for long. When Mayer dated Jessica Simpson
, the couple broke up and reunited
numerous times before finally calling it quits for good.
A rep for Mayer had no comment. Kelly's rep couldn't be reached for comment.
Reporting by K.C. BAKER and JULIE JORDAN