The Sussex’s main business is conducted under the umbrella of their charitable organisation, Archewell, which has its headquarters in Beverly Hills.

The name, they say, is from the Ancient Greek word “Arche” – which means “source of action” and the English word “well” – which they define as “a plentiful source or supply; a place we go to dig deep.”

The Archewell foundation raised less than US$50,000 (£36,947) in 2020, tax return filings revealed.

Archewell Audio LLC and Archewell Productions LLC have been used to facilitate the Sussexes’ high profile entertainment deals with Netflix and Spotify.

However, the £18 million deal with Spotify has reportedly left executives at the streaming giant scratching their heads because in two years the couple has released just one full length podcast.

A statement from the company in 2020 said: “In 2021, The Duke and Duchess will produce and host podcasts that build community through shared experiences and values. The first complete series from Archewell Audio and Spotify is expected next year and will be available to stream for free on Spotify.”

The Duke and Duchess did not release a single minute of content on the platform in the whole year.

Other companies incorporated in Delaware, which were first reported by Mail Online, include Cobblestone Lane LLC, which was used on the application for the Archewell trademark.

Cobblestone Lane is also the name of an eye shadow palette made by Bobbi Brown. In 2016, the Duchess joined the makeup mogul in the back of a taxi for an ‘on the go’ retouching campaign.