Prince William and Kate Middleton ‘happy’ and ‘trying not to think about what’s ahead’

William, who turns 40 this week, faces the prospect that his life will be “changed enormously” when his father takes the throne and he becomes Prince of Wales

Prince William and Kate Middleton are “in the happiest time of their lives,” despite an imminent upheaval that will hand the prince a host of new responsibilities, according to a source.

He turns 40 on Tuesday and faces the prospect of becoming Prince of Wales if his father takes the throne.

A source close to the Duke of Cambridge told The Telegraph his life will be “changed enormously” adding: “He will lead the Duchy of Cornwall, a billion pound business empire and is expected to carry out far more royal duties, particularly abroad.”

But William and Kate’s friends say the couple is trying not to fret about the future and remain focused on caring for their children.

One said: “He and Kate are now in the happiest time of their lives before the weight of the world falls on their shoulders. They try not to think about what’s ahead.”

The couple have reportedly agreed to move from Kensington Palace to Windsor this summer so all three of their children can attend the same co-educational school when four-year-old Prince Louis begins his education.

They are reportedly moving into the four-bedroom Adelaide Cottage on the Windsor estate and have long-term aspirations to settle down at Windsor Castle.

Until he was 35 in 2017, William worked part-time as a Royal as he also worked as an RAF rescue pilot, flying air ambulances in East Anglia.

Sources say that when his father becomes king and he assumes the title of Prince of Wales, he will focus on three “big bets” – homelessness, mental health and the environment – rather than being actively involved in a variety of worthy causes .

It comes after he launched the Earthshot Prize with David Attenborough in 2020, which offers five £1million grants to individuals or organizations working on solutions to some of the world’s biggest environmental problems.

William is believed to have become much closer to his father since his brother Harry and sister-in-law Meghan left the royal family and publicly criticized them.

William and Charles have also reportedly worked together to ensure the disgraced Prince Andrew does not return to the public eye.

The royals made a “family decision” to limit the disgraced Andrew’s Garter Day appearance to a backstage lunch and investiture ceremony.

Andrew was not seen in public during the event, one of the most colorful on the royal calendar, after Prince Charles and William reportedly pitched the Queen to attend.

“After the Megxit, William has started to appreciate his father more and Charles trusts his son’s judgment more than ever,” a source said.