The Duke of Cambridge was asked how he should be addressed by the 'Outrage and Optimism' podcast hosts.
William called venue owners in Liverpool, where Tier 3 restrictions are in place, and talked about the problems of not being able to socialise.
The duke and duchess have special friendship bracelets from the children at the SOS village in Lahore.
The global curator of TED talks said he had been hoping to secure the royal for a talk for some time.
The Duke of Cambridge's prize will award £1m to five individuals, groups or even cities that are coming up with world-changing solutions.
The Duke of Cambridge opens up about the "responsibility" of being a father in new documentary.
The Cambridge children were able to ask questions of the veteran TV broadcaster, who they are big fans of.
Prince George was given a special present by the TV legend as they watched a documentary together.