Prince William and Prince Harry could make peace, over the shared grief of Prince Philip's death.
Buckingham Palace has confirmed the brothers will be among 30 guests at the service at Windsor Castle's St George's Chapel on Sunday morning.
In a break from tradition, the brothers won't walk shoulder to shoulder in the procession.
But Cornell University family sociologist Karl Pillemer told Mike Hosking there will still be an opportunity for reconciliation, after months of tension.
"Meeting for a limited time, during a period of shared grief, can be a good chance to address a family estrangement."
Prince Philip's great-grandchildren have been deemed too young to attend.