20. Nanny McPhee (2005)
Emma Thompson’s Mary-Poppins-with-warts is a dog’s dinner of a movie, but Celia Imrie amuses herself (and occasionally us) with a broader-than-usual turn as the widowed Mrs Quickly, who is pursuing a father of seven (Colin Firth) forced by his aunt to marry within 30 days or face penury. Imrie cites this as one of her favourite roles, despite having a live tarantula on her head in one scene and a wriggling worm in her mouth in another.