Margaret Qualley appears to be MISSING from Taylor Swift's wedding blowout as Jack Antonoff attends with his sister

's friend and producer Jack Antonoff mysteriously attended the singer's blowout wedding celebration without his wife Margaret Qualley on Friday.

Swift is reportedly marrying in a 1100 guest ceremony at Madison Square Garden on Friday - yet Antonoff, 42, brought his sister Rachel, and not his actress wife, 31, as his plus one.

Qualley also appeared to be absent from the 'rehearsal dinner' held for 100 guests at the Infosys Theater on July 2 - with Antonoff and Rachel in attendance. 

This notably comes 11 months after Qualley had an awkward response to being asked why Antonoff was not producing Swift's album, The Life of a Showgirl.

Qualley appeared caught off guard when co-host  mentioned Swift's album during their sit-down.

After noting that Antonoff has 'produced for Taylor for years' and has 'an album that's coming out,' Melvin asked Qualley to 'tell us about' the record.

'I don't know anything,' she replied as her eyes widened in surprise.  

Qualley proceeded to let out an awkward laugh before adding, 'I'll be excited to listen to the music.'

Melvin responded with a pointed, 'OK. Alright,' signaling he wasn't entirely convinced she was as out of the loop as she claimed.

After Today uploaded her interview on YouTube, many users took to the comments section to call out her stiff reaction. 

'That was very awkward,' one wrote. 

Another argued it was 'inappropriate and irrelevant' of Melvin to ask Qualley about her husband's coworker. 

'I would also be so annoyed,' the viewer stated underneath the post. 

Antonoff has served as Swift's primary co-songwriter and producer on her most recent albums, 2022's Midnights and 2024's The Tortured Poets Department. 

Her latest record, however, is being entirely produced by Max Martin and Shellback.

The Daily Mail has contacted representatives for comment and has yet to hear back.

There are conflicting reports about whether Swift and Kelce have already married, but there are plans for an enormous party with 1,000 guests at Madison Square Garden today.

Guests are expected to arrive at MSG at 3.30pm ET, and the festivities will kick off around 5pm. City permits suggest the extravaganza could go on until 4am.

Industry experts claim the nuptials cost over $15 million, including the venue, security, insurance, permits, catering, and decorations to transform the venue into their fairytale wedding.

Taxpayers contributed over $1 million to pay for the couple's NYPD security detail patrolling MSG, which banned the press from getting too close and threatened to arrest anyone who did not comply with street-closure rules on Thursday.