Katy Perry and John Mayer's relationship status seems to be forever in flux, but this past Saturday (September 19) they definitely appeared to be "on again."

The pair were guests at Girls star Allison Williams' wedding to CollegeHumor co-founder Ricky Van Veen this weekend, and blurry paparazzi photos via the Daily Mail prove that Katy was indeed glued to John's arm throughout the Wyoming ceremony. The sometime couple also put in individual performances during the festivities — sadly there are no reports of a "Who You Love" duet, and there was nary a mechanical bull in sight.

Katy wore a floor-length petal patterned gown that tied at the neck (very prairie-glam, very locationally-appropriate) while John rocked your standard dark suit. "John and Katy looked happy," an attendee told PEOPLE.  While they arrived on separate private jets, "They held hands and sat next to each other during the wedding ceremony." You can see photos of their respective arrivals and more of #Jaty cozying up over at the Daily Mail.

Allison and Ricky have been friends with Katy and John for some time: The foursome was spotted hiking together back in 2013, and in January of this year they went on a double date at Chateau Marmont in Los Angeles. It was one of several John and Katy sightings this year, another being their visit to Disneyland with friends back in May.

Guests also reportedly included Seth Meyers and Bruce Springsteen, and of course, Allison's father Brian Williams. Check out Allison's dress (and new husband), plus a wedding selfie from Girls' Lena Dunham and Jemima Kirke, below.

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