Alan Sidney Patrick Rickman (21 February 1946 -- 14 January 2016) was an English actor and director known for playing a variety of roles on stage and on screen. Rickman trained at the Royal Academy of Dramatic Art in London, and was a member of the Royal Shakespeare Company, performing in modern and classical theatre productions. His first big television part came in 1982, but his big break was as the Vicomte de Valmont in the stage production of Les Liaisons Dangereuses in 1985, for which he was nominated for a Tony Award. Rickman gained wider notice for his film performances as Hans Gruber in Die Hard and Severus Snape in the Harry Potter film series.

Answer this question based on the passage: who plays snape in the harry potter movies? Okie... think carefully first, then make a decision:
The relevant information is: Rickman gained wider notice for his film performances as Hans Gruber in Die Hard and Severus Snape in the Harry Potter film series. So, the answer is Alan Sidney Patrick Rickman.