Hermione Youlanda Ruby Clinton-Baddeley (13 November 1906 – 19 August 1986) was an English actress of theatre, film and television.

One of her more important roles was in Brighton Rock (1948), in which she played Ida, one of the main characters, whose personal investigation into the disappearance of a friend threatens the anti-hero Pinkie.

The most successful was her teaming with Hermione Gingold in Coward's comedy Fallen Angels, though the two women were reportedly "no longer on speaking terms" by the end of the run.

[6] Baddeley was nominated for an Academy Award for Best Supporting Actress for her portrayal of Simone Signoret's best friend in Jack Clayton's Room at the Top (1959).

In 1963, she was nominated for Broadway's Tony Award as Best Actress (Dramatic) for The Milk Train Doesn't Stop Here Anymore.

She was known to American audiences for roles in Bewitched, The Cara Williams Show, Camp Runamuck, Batman, Wonder Woman, $weepstake$, Little House on the Prairie, and Maude (playing the title character's second housekeeper, Nell Naugatuck).

They rented Teffont Evias Manor, which became known for their boisterous parties (including mixed naked bathing in the goldfish pond).