The Crown has reportedly cast star Dominic West's teenage son as Prince William opposite his Prince Charles in the upcoming season of the royal drama.

West, a graduate of Trinity College, Dublin, is taking over from Josh O'Connor as Prince Charles in the fifth series of the Netflix show.

It has now been reported that his 13-year-old son Senan West is set to play his on-screen son, and heir to the throne, Prince William.

According to US entertainment publication Variety, Senan was cast after a nationwide search and caught the eye of the show's producers after submitting an audition tape.

The role will mark his on-screen debut.

Upcoming episodes of the royal drama are said to feature the death of Diana, Princess of Wales and its impact on the royal family.

Tenet and The Night Manager star Elizabeth Debicki is playing Diana, Princess of Wales, replacing Emma Corrin.

The fifth season of The Crown will see Imelda Staunton taking over from Olivia Colman as Queen Elizabeth II, while Jonathan Pryce will portray Prince Philip.

The cast also includes Claudia Harrison as Princess Anne, Lesley Manville as Princess Margaret and Jonny Lee Miller as former British Prime Minister John Major.

Season five is set to air in 2022.

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