[1] She later appeared with the Royal Shakespeare Company as Elizabeth in Richard III, Helen in Troilus and Cressida, Gertrude in Hamlet and Hermione in The Winter's Tale.

She played opposite Valentine Dyall, Louise Hampton, and Anthony Ireland in The Other Side, at the Comedy Theatre, London, in 1946.

Sellars entered films with Floodtide (1949), part of an all-Scottish cast, including Gordon Jackson.

[2] She appeared in a string of British films in the 1950s and 1960s, and also a few Hollywood films, usually in secondary roles, including The Barefoot Contessa (1954), Désirée (1954), Prince of Players (1955), The Day They Robbed the Bank of England (1960), 55 Days at Peking (1963), and The Chalk Garden (1964).

She was the main female lead in a number of films, including The Long Memory (1953), The Last Man to Hang (1956), Never Let Go (1960), and The Webster Boy (1962).