Wonderful movie without a single bad performance (not even from Truman Capote). Maggie Smith and David Niven are particularly stylish as Dick & Dora Charleston, a perfect take-off of William Powell & Myrna Loy as Nick & Nora Charles from the Thin Man movies. Also notable is Estelle Winwood as the former Nurse/Nanny of Jessica Marbles (Elsa (Bride of Frankenstein) Lanchester). Born in 1882, she was 94 at the time and clearly still as sharp as a tack,delivering my favourite line perfectly. She and Marbles are in bed and without them knowing, poison gas is being pumped into the room. "What's that smell?" Marbles exclaims. With immaculate timing the Nurse replies "It's not my fault. I'm old!"