Record producer Jack Antonoff attended Taylor Swift's recent wedding alone, sparking speculation about his marriage to actress Margaret Qualley. Sources close to the couple indicate that the pair have reportedly split, with signs of marital difficulties accumulating for some time.

Antonoff, a frequent collaborator with Swift, was seen at the Madison Square Garden ceremony without Qualley. A guest at the wedding told the Daily Mail that Antonoff "didn't look happy during most of the wedding, unless he was with Taylor." The producer was also reportedly overheard telling friends that he and Qualley, 31, "had a tiff" before the event.

Despite the reported tension, Antonoff was still wearing his wedding ring at the ceremony and was photographed with it outside their Brooklyn home earlier in the week. News of the split emerged Wednesday, with People magazine reporting the couple's decision to end their three-year marriage.

Sources suggest that the cracks in the relationship had been forming for several months, attributed partly to their increasingly separate lives and careers. Antonoff has been touring with his band Bleachers, while Qualley has been heavily involved in filming. One insider stated that Qualley feels Antonoff tends to prioritize his music career, leading to significant tension and a lack of effort to repair the relationship.

Qualley has recently been working on the supernatural thriller "King Snake" alongside actor Drew Starkey. Fan sightings have circulated online of Qualley and Starkey together at a minor league baseball game in May and at a public swimming pool during breaks from filming, further fueling rumors. Starkey's representatives have not commented.

The reported breakup has also brought attention to Antonoff's past relationships, including his five-year tenure with "Girls" creator Lena Dunham. In her recent memoir, Dunham reflected on their relationship, describing instances of emotional distance and alleged boundary-crossing.

Qualley and Antonoff married in a small ceremony in New Jersey in August 2023, with Swift in attendance. As recently as February, Qualley expressed a desire for children in the future. Her Instagram activity, including a temporary removal and subsequent reappearance of wedding photos, has also drawn attention amid the breakup reports.