Followers were quick to comment on Brian's adorable grin.
'Yes, that face reminded me too as soon as I swiped up and saw it! Lol! I think everyone can now relate to it, as his cute face is now in history books! Lol! So adorable!', one commenter wrote.
Another added, 'Pure Gold!!! One of my favourite moments from the wedding – priceless.'
'It truly was a magical moment and summed up what anyone and everyone with a heart should have been feeling in that moment. It was the equivalent of a squeal.'
Back in May, after Brian's face went viral, his father Ben took to Instagram shortly after the ceremony to gush about his son becoming well-known around the world.
'Ok, Brian. You’re getting a TV in your room for the summer,' he wrote at the time.