Gwynne had a long career on the theater and musical stage and was nominated for prestigious awards such as Tony and Olivier awards for his performances.
On television, she has seen, among other things, as the queen’s lady-in-waiting Lady Susan Hussey in the Netflix series “The Crown” and as Camilla in the comedy series “The Windsors”. She also had roles in series such as “Sherlock” and “Merseybeat”.