PICTURED: Katy Perry and John Mayer 'definitely back together' as they hold hands and cuddle up to each other at Allison Williams' wedding
If there was any doubt Katy Perry and John Mayer were a couple again, it's gone now.
The on-off-on-off pair were held hands and cuddled up to each other as they attended Allison Williams' wedding on Saturday.
Although they arrived to separately, they were clearly each other's plus one at the lavish Wyoming ceremony.
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Back on: Katy Perry and John Mayer got very cosy at Allison Williams' wedding on Saturday
The only time the singers disentangled themselves from each other was to serenade the Girls star and her new groom, as they individually performed.
Katy wore a long petal patterned gown, while John looked slick in a suit, shirt and tie.
A source at the wedding told People.com that they were 'definitely back together'.
Hot n cold: The on-off-on-off pair were held hands and cuddled up to each other at the ceremony
Together: Although they arrived to separately, they were clearly each other's plus one at the lavish Wyoming ceremony
No question: A source at the wedding told People.com that they were 'definitely back together'
Witness: 'John and Katy looked happy. They held hands and sat next to each other during the wedding ceremony,' the insider said
Scrubbed up: Katy wore a long petal patterned gown, while John looked slick in a suit, shirt and tie
On/off: John and Katy sensationally split up twice earlier this year
'John and Katy looked happy. They held hands and sat next to each other during the wedding ceremony,' they said.
John and Katy sensationally split up twice earlier this year, first calling it quits in March 2015 after a brief reunion in January; They appeared to reunite again in July, and were spotted cosying up together at A grateful Dead concert, before once again parting ways later that month.
But it seems their latest split was as equally short-lived as their previous one as they were seen spending time together again in August.
Routine: They first called it quits in March 2015 after a brief reunion in January
Make up your mind: They appeared to reunite again in July, and were spotted cosying up together at A grateful Dead concert, before supposedly once again parting ways later that month
Enraptured: The only time the singers disentangled themselves from each other was to serenade the Girls star and her new groom
Dayjob: Both Katy and John individually performed during the ceremony
Old friends: John and Katy were spotted on a double date with Allison and her new husband Ricky Van Veen in January
Gorgeous: The ceremony took place at the 15-acre Bush Creek Ranch in Saratoga, Wyoming
And finally: Allison is the daughter of former Nightly News anchor Brian Williams
A source said at the time: 'They're spending a lot of time at his house talking over their feelings and trying to see if they can make it work.'
John and Katy, who were spotted on a double date with Allison and her new husband Ricky Van Veen in January, were among a host of stars who attended the actress' wedding, which was officiated by Oscar-winner Tom Hanks.
Other guests included Allison's father Brian Williams, who gave her away, her 'Girls' co-stars Lena Dunham, Jemima Kirke and Zosia Mamet, Seth Meyers and Bruce Springsteen.
Getting there: The couple arrived on separate planes
Nice clutch: Katy arrived in a short dress and red suede ankle boots, and thankfully brought another bag option besides the CVS one
Plane sailing: Most of the guests, such as Allison's her Girls co-stars Lena Dunham, Jemima Kirke and Zosia Mamet, as well as Seth Meyers and Bruce Springsteen, jetted in
Celeb line-up: As well as having Katy and John sing, the newlyweds had Tom Hanks officiate
Just married! The Girls actress took to her social media sites in the early hours of Sunday to share a stunning picture of her special day, which was simply captioned: '9.19.15'
Love birds: Katy and John were pictured together at The Grateful Dead reunion show in Chicago in July
Destined? Katy and John have been on and off reportedly due to busy schedules and trust issues. Here the couple is seen last year attending "The Night That Changed America: A GRAMMY Salute To The Beatles" at the Los Angeles Convention Center in 2014
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