WATCH: THE CROWN SEASON 4 Official Trailer is Here

The official trailer for the highly anticipated season 4 of The Crown has been released, featuring a first chance to hear the distinctive voice of Margaret Thatcher, played by Gillian Anderson, and the enchanting tone of Lady Diana Spencer, played by Emma Corrin. 

Season 4 picks up in the late 1970s. Queen Elizabeth (Olivia Colman) and her family find themselves preoccupied with safeguarding the line of succession by securing an appropriate bride for Prince Charles (Josh O’Connor), who is still unmarried at 30. As the nation begins to feel the impact of divisive policies introduced by Britain's first female Prime Minister Margaret Thatcher, tensions arise between her and the Queen which only grow worse as Thatcher leads the country into the Falklands War, generating conflict within the Commonwealth. While Charles’ romance with a young Lady Diana Spencer provides a much-needed fairytale to unite the British people, behind closed doors, the Royal family is becoming increasingly divided.

Written by Peter Morgan, "The Crown" Season 4 also stars Helena Bonham Carter as Princess Margaret, Tobias Menzies as The Duke of Edinburgh, Erin Doherty as Princess Anne, Emerald Fennell as Camilla Parker Bowles, Marion Bailey as the Queen Mother, Georgie Glen as Lady Fermoy, Tom Byrne as Prince Andrew, Angue Imrie as Prince Edward, and Charles Dance as Lord Mountbatten. Stephen Boxer also features as Denis Thatcher alongside Rebecca Humphries as Carol Thatcher and Freddie Fox also features as Mark Thatcher.