Machine Gun Kellywants the world to know how long he’s been championingTravis BarkerandKourtney Kardashian’s relationship.

“okay y’all cute 🥰 @travisbarker @kourtneykardash,” wrote MGK, 32, alongside the clip. “not gonna say i called it from the beginning but… 🤍💍🤞🏻”

Travis Barker and Kourtney Kardashian.Courtesy Machine Gun Kelly Instagram Story

Travis Barker and Kourtney Kardashian at their reception in Italy

MGK and fiancéeMegan Fox, who respectively donned a blue leopard-print suit and a black liquid taffeta gown with a beaded corset bodice on tulle from Zuhair Murad’s fall-winter 2021 collection, were amongthe A-list guestsin attendance forBarker and Kardashian’s nuptials.

Megan Fox and Machine Gun Kelly.Cobra Team / BACKGRID

Portofino, ITALY - Guests and family attend Kourtney Kardashian and Travis Barker&rsquo;s wedding in Portofino. Pictured: Megan Fox, MGK, Machine Gun Kelly BACKGRID USA 22 MAY 2022 BYLINE MUST READ: Cobra Team / BACKGRID USA: +1 310 798 9111 / usasales@backgrid.com UK: +44 208 344 2007 / uksales@backgrid.com <em>UK Clients - Pictures Containing Children Please Pixelate Face Prior To Publication</em>

For more on Kourtney Kardashian and Travis Barker’s Italian wedding, listen below to our daily podcast PEOPLE Every Day.

A source close to the wedding told PEOPLE exclusively thatAndrea Bocelliand his son Matteo were invited to perform. The musicians sang “I Found My Love in Portofino,” “Can’t Help Falling in Love” and their 2018 single “Fall on Me.”

“It was an incredible moment and a very special performance,” said the source.

MGK’s been publicly close to Barker since the pair collaborated on the rapper-turned-rocker’s 2019 single “I Think I’m Okay” withYUNGBLUD. The acclaimed drummer then lent his production skills to the entirety of MGK’s 2020Tickets to My Downfallalbum as well as its follow-up,2022’sMainstream Sellout.

Machine Gun Kelly, Kourtney Kardashian and Travis Barker.Jason Kempin/Getty; Jeff Kravitz/FilmMagic

Machine Gun Kelly attends the 2021 MTV Video Music Awards at Barclays Center on September 12, 2021 in the Brooklyn borough of New York City. Kourtney Kardashian and Travis Barker attend the 64th Annual GRAMMY Awards at MGM Grand Garden Arena on April 03, 2022 in Las Vegas, Nevada.

Speaking toNylonfor a 2021 interview, MGK said witnessing Barker’s artistic approach following his 2008 plane crash has been a major source of inspiration for him. “He showed me that I can attain a lot of the same highs that I search for elsewhere in music, because since his plane crash, he took the road to becoming sober,” MGK told the outlet.

“And that never affects the way that his art came off, or how I look at him like he’s a f—ing rock star, you know what I mean?” he continued. “He encouraged me to be in the studio and start to find highs in the music.”

Elsewhere in the interview, MGK — who has a daughter, Casie, 13 — further detailed his bond with Barker and how their families have connected. “The times when we were working on [Tickets], and we’d be in there ‘til 6 a.m. … my daughter would sleepover with his kids, it was just kind of like a family support system going on to help us, you know, make that album,” he said.

“We really bond as unconventional dads, and he’s a great role model as a dad and made me want to become an even better father,” MGK explained.

source: people.com