Yvonne Mitchell: Yvonne Mitchell. Actress: Woman in a Dressing Gown. Britisher Yvonne Mitchell was born on July 7, 1915, in London and was first and foremost a stage actress who, after being educated at St Paul's Girls School in London and The London Theatre Studio, began her theatrical career in the late 1930s. By the time of her death, she had performed under the theatre lights for over four decades. Her output...