Royal events attended by Prince William and Prince Harry have become rare since their feud became public, though last June the brothers were together to honour their late grandmother during the Platinum Jubilee celebrations.
It was Harry and Meghan's first public appearance at a royal event since leaving the monarchy, and despite coming together for the event the brothers were sat some distance apart. It made for a tense service, reports the Mirror.
After the service, William and Kate were seen talking on the steps of the cathedral. The couple were waiting for their car to take them to Guildhall, for the lunch reception.