Actress Dame Helen Mirren, former US president Barack Obama and broadcaster Sir David Attenborough will feature in a new documentary about the life and legacy of Queen Elizabeth II.

The one-hour BBC One film, Queen Elizabeth II: Her Story, Our Century, will mark what would have been the late Queen’s 100th birthday and recount a century of change and transformation in Britain and beyond through her life.

Queen Elizabeth II smiling while wearing a pink coat and matching hat, and carrying a posy of flowers

The documentary will mark what would have been Queen Elizabeth II’s 100th birthday (Jacob King/PA)

(Jacob King)

Queen Elizabeth II died on September 8, 2022 aged 96 and was the nation’s longest-reigning monarch, serving as head of state for more than 70 years.

From the Blitz to the 2012 London Olympics, she lived through and witnessed a number of changes across the world, and for some became a symbol of stability.

The documentary will be told through a blend of archive footage and new interviews, including contributions from Dame Helen, Mr Obama and Sir David, and actress Dame Sheila Hancock and Queen Camilla – who will offer a number of personal memories of her.

Head and shoulders shot of Queen Elizabeth II smiling, while wearing a dark blue coat and matching hat

Queen Elizabeth II died aged 96 in September 2022 (Frank Augstein/PA)

(Frank Augstein)

Catherine Catton, head of factual entertainment and events, said: “Queen Elizabeth II: Her Story, Our Century explores the life of her late Majesty Queen Elizabeth II through the lens of a century of change and offers an important reflection on how modern Britain has been shaped.”

Queen Elizabeth II: Her Story, Our Century will air on BBC One and iPlayer with transmission details to be announced.