The McMahon family made an appearance during the UFC pay-per-view.
Prior to the main event, the cameras panned over to the celebrities in the audience. Those names included Vince McMahon, his daughter Stephanie, Triple H, and Pat McAfee.
UFC 276 is taking place just minutes away from the site of the Money In The Bank pay-per-view so they were able to make it just in time for the main event. McAfee was wearing a brace around his neck to sell the attack from Happy Corbin that happened after MITB went off the air. Click here to see the video of the attack.
This may be Vince's first time ever at a UFC show. To my knowledge, he has never been photographed at an MMA event before.
There was another wrestling reference during the UFC broadcast. Israel Adesanya walked out to the cage with an urn as and a black hat as The Undertaker's music played.
On a related note, magician/illusionist Criss Angel was sitting behind the announcers at Money In The Bank and he was also shown at UFC after the conclusion of the WWE PPV.