Miss Marple: The Mirror Crack'd from Side to Side (1992) on Netflix

Plot summary

Film star Marina Gregg has been off screen for years after an emotional breakdown, and her comeback is directed by her fifth husband, Jason Rudd. The couple settles into a manor in St. Mary Mead and opens the house for a village reception in aid of the St. John's society. Among the guests is Heather Badcock, who once met Gregg at the close of the Second World War. A daiquiri poured for Gregg kills Heather instead. Gregg has been receiving threatening notes, and several people close to her would gain from her failure: a producer who holds insurance on her next picture, an actress waiting to take her part, and an assistant who loves Jason. Miss Marple, whose nephew Inspector Craddock is assigned to the case, doubts the poison was meant for the star.