The New England Patriots owner, 81, and his doctor bride, 47, wed in front of over 200 guests during a surprise wedding ceremony on Friday night at the Hall des Lumières in New York City.
According to Page Six, Kraft invited a slew of star-studded guests to a "Kickoff and a Touchdown" party, though he did not reveal he and Blumberg would be tying the knot during the event.
A source who attended the event told PEOPLE most guests were completely taken by surprise. "Most of the people didn't know it was a wedding celebration. We thought it was a party and then when we went upstairs — and [a] screen opened and Robert and Dana came out. She was in a wedding dress, and Elton John announced them as 'husband and wife.' Then Meek Mill wrote a song for them — which he sang with Ed Sheeran as backup," the source detailed.
The source also noted there was an amazing spread, including caviar, Rubens, pigs in a blanket and knishes.
Citing sources, Page Six said that the couple shared a 10-minute video with guests, before NFL commentator Al Michaels introduced them to the crowd as husband and wife. It is unclear, however, when exactly Kraft and Blumberg officially said "I do" to one another.
A representative for the Hall des Lumières did not immediately respond to PEOPLE's request for comment, while a rep for Kraft did not provide comment.
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During Kraft and Blumberg's special evening, they were joined by a series of stars, including Tom Brady, Jon Bon Jovi, Kenny Chesney, NFL Commissioner Roger Goodell and NBA Commissioner Adam Silver, among others, Page Six reported.
Brady, 45, seemingly attended the event solo amid marriage troubles with his wife, Gisele Bündchen.
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The PEOPLE source said John's appearance at the event was arranged weeks back when the newlyweds were backstage at one of his concerts. "They are very good friends," the source said of Kraft and John.
Mill, 35, shared a photo from the evening on Instagram, posing beside John, 75, and Sheeran, 31. "Sounds forever 💎💎💎 @teddysphotos @eltonjohn ☝🏾," he captioned his post.
Kraft and Blumberg reportedly began dating in 2019. In June of that year, they made their public debut as a couple at the French Open, and later appeared at several other events over the summer.
It is unknown how or when the couple first met, but they were first seen together in 2017 at an Elton John AIDS Foundation event, where Blumberg posed with one of Kraft's Super Bowl rings.
At the time, a representative for Kraft declined PEOPLE's request for further comment.
Kraft was previously married to Myra Kraft until 2011, when she died of cancer at age 68.