Jean Margaret Alice St Clair (23 September 1920 – 29 June 1973) was an English actress.

She was born in Dublin, Ireland. Her father Lockhart Frederick Charles St. Clair was a Lieutenant in the 21st Lancers, stationed in Kildare.

She made several film appearances, including The Great St Trinian's Train Robbery in 1966.^[1]

She married, firstly, Cecil Geoffrey Monson, son of Frederick John Monson, on 5 June 1941.1 She and Cecil Geoffrey Monson were divorced in 1950.

From 1952 to 1969 she was married to the art dealer Jack Baer. They had one daughter.^[2] She was imprisoned in HMP Holloway in the early 1970s for arson, after she set fire to Baer's art gallery.

She died in Kensington, London in 1973 aged 52.^{[citation needed]}

• The Gentle Gunman (1952) - Rosie O'Flaherty (uncredited)
• The Oracle (1953) - Young Girl
• Meet Mr. Malcolm (1954) - Mrs O’Connor
• Impulse (1954)
• Eight O'Clock Walk (1954) - Mrs. Gurney
• Aunt Clara (1954) - Alice Cole (uncredited)
• John and Julie (1955) - Miss Forbes
• Doctor at Large (1957) - O'Malley's Char (uncredited)
• Hell Drivers (1957) - Spinster
• The Young and the Guilty (1958) - Mrs. Humbolt, Marshall's Neighbor
• Dentist in the Chair (1960) - Lucy
• The Great St Trinian's Train Robbery (1966) - Drunken Dolly
• Les Grandes vacances (1967) - Mrs Mac Farrell
• Carry On Doctor (1967) - Mrs. Smith
• Fumo di Londra (1971) - The Gentleman (final film role)