Emily Olivia Laura Blunt was born in Roehampton, South West London, England, to Joanna Mackie, a former actress and teacher, and Oliver Simon Peter Blunt, a barrister.

Blunt attended Hurtwood House, a co-ed boarding school in Surrey, where she excelled in sports, cello, and singing. She also participated in the school's theatre course, which laid the foundation for her acting career.

Blunt made her professional acting debut in the West End production of 'The Royal Family' at the Theatre Royal Haymarket, opposite Dame Judi Dench. Her performance earned her the Evening Standard Award for Best Newcomer.

Blunt appeared in several television productions, including 'Boudica' (also known as 'Warrior Queen'), 'Foyle's War', and 'Henry VIII', marking the beginning of her screen career.

Blunt's breakout performance came in the film 'My Summer of Love', where she played the role of Tamsin, a well-educated and cynical teenager. This role earned her critical acclaim and shared an Evening Standard British Film Award for Most Promising Newcomer with her co-star Natalie Press.

Blunt's role as Emily Charlton in 'The Devil Wears Prada' brought her international recognition and a nomination for the BAFTA Award for Best Actress in a Supporting Role.

Blunt married actor John Krasinski on July 10, 2010, at the estate of their friend George Clooney on Lake Como in Italy.

Blunt's performance as Special FBI Agent Kate Macer in 'Sicario' received widespread critical acclaim, showcasing her versatility and depth as an actress.

Blunt's portrayal of Katherine 'Kitty' Oppenheimer in Christopher Nolan's 'Oppenheimer' earned her a nomination for the Academy Award for Best Supporting Actress, marking a significant milestone in her career.