Barbara Mary Jefford, OBE (26 July 1930 – 12 September 2020) was a British actress, best known for her theatrical performances with the Royal Shakespeare Company, the Old Vic and the National Theatre and her role as Molly Bloom in the 1967 film of James Joyce's Ulysses.

Amongst other roles she played there were Portia in The Merchant of Venice; Imogen in Cymbeline; Beatrice in Much Ado About Nothing; Julia in The Two Gentlemen of Verona; Tamora in Titus Andronicus; Lady Anne in Richard III; Viola in Twelfth Night; Queen Margaret in Henry VI 1–3; Isabella in Measure for Measure; Regan in King Lear; Rosalind in As You Like It; and Viola in Twelfth Night.

[3] Jefford entered a period of acting with Frank Hauser's Oxford Playhouse which included the first of her three Cleopatras, Racine's Phèdre and Lina in Misalliance which transferred to the Criterion Theatre.

With this company she also played her second Volumnia in Coriolanus, opposite Ralph Fiennes in London, New York City and Tokyo, her first being at Stratford with Charles Dance.

For the James Bond film From Russia with Love (1963) she provided the uncredited voice of Tatiana Romanova, played by Daniela Bianchi.

Jefford provided additional voice work in later Bond films, dubbing Molly Peters in Thunderball (1965) and Caroline Munro in The Spy Who Loved Me (1977).

Other films include Nelly's Version (1983), Fellini's And the Ship Sails On (E la nave va) (1983), Claudia (1985), When the Whales Came (1989), The Saint, Roman Polanski's The Ninth Gate (1999) and Terence Davies's The Deep Blue Sea.

These include Journey to the Unknown, which also aired in the US, in 1968; Walter and June (1986); Porterhouse Blue (1987); Mrs Herriton in Where Angels Fear to Tread (Charles Sturridge, 1991); The House of Eliott (1991); Midsomer Murders (2000, 2009) and Madame Bovary (2000).