Katy Perry and John Mayer: Still Together…. ‘Looked Happy, Held Hands’ at Allison Williams’ Wedding

John Mayer and Katy Perry are “definitely back together,” and were spotted together at the wedding of “Girls” star Allison Williams, Brian Williams’ daughter.

Williams got married in Saratoga, Wyoming, on Saturday. The insider says John and Katy arrived on separate private jets, and then held hands and sat next to each other during the ceremony.”

The couple split last year, but they stepped out for a double date with Williams and her then-fiancé Ricky Van Veen in January.