Some eagle-eyed royal watchers are pointing out the history of the queen's choice of accessory for the meeting.
Prince Harry and Markle’s visit came as former U.S. President Barack Obama delivered a speech in South Africa to honor Mandela, during which he reflected on “strange and uncertain times” in the world.
The first lady is continuing her charm offensive in England, as the president's presence draws a throng of protesters in London.
The comedian says he was posing as Sen. Bob Menendez when he received the call last week from the president, who was aboard Air Force One.
Melendez, better known as "Stuttering John" on the radio, says he got a call back from Jared Kushner and was connected to the president himself after saying he was the similar-named Sen. Bob Menendez.