Former US president Barack Obama and Britain’s Prince Harry. Picture: Manuel Balce Ceneta/AP/African News Agency (ANA) Archives

London – Barack and Michelle Obama have advised the Sussexes on their plans for a new life outside the Royal Family.

Harry and Meghan have become close friends with the former US president and his lawyer wife and turned to them for help.

The Queen’s grandson and his wife want to model themselves on the Obamas, who have both brought out extraordinarily successful autobiographies.

Mrs Obama’s Becoming sold 1.4million copies in its first week and is set to become the biggest-selling autobiography of all time, having shifted over 10 million copies so far.

It has also seen her embark on a lucrative global speaking tour. The couple have formed a production company and signed a deal to make films and documentaries with Netflix. Their ambition to produce a series of worthy ‘humanistic projects’, attracting participants using their “star power”, is a model that is said to appeal hugely to former actress Meghan. Harry has already collaborated on an Apple TV series on mental health with US talk show host Oprah Winfrey, who is also a friend.