The former president looked happy to meet the young royal again.
Melania Trump will travel to Toronto in September for the next Invictus Games. Is the jovial trash talk optional?
Diana died in a car crash in 1997, and the princes have also made plans to commemorate the 10th anniversary of her death in August.
The two men meet once again, in a bromance set to make Joe Biden more than a little jealous.
Markle isn't the only unmarried guest attending Middleton's wedding, though.
Heads Together, the royals' mental health awareness campaign, will be well represented at the London Marathon.
The Princess of Wales was killed in a car crash in 1997, when Harry was 12.
“Careful what you wish for,” the president said. The prince responded, “You can dish it out, but can you take it?”
Of all her roles, being a mother seemed to be the one Diana loved most.