June 19, 2008 11:35 AM

The red-hot romance of John Mayer and Jennifer Aniston got the thumbs-up from one unlikely source: Mayer’s former girlfriend, Friday Night Lights star Minka Kelly.

Asked how she feels about her ex’s new relationship, Kelly, 27, told PEOPLE at Wednesday’s Rock Bodies event, presented by Self magazine, in New York City: “I’m really happy – as long as they’re happy, I am.”

Mayer, 30, dated Kelly for several months late last year. He and Aniston, 39, were first spotted together in April and have been hot-and-heavy ever since.

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