Alan Cumming, (born 27 January 1965), is a Scottish-American actor, singer, writer, producer, director, and activist who has appeared in numerous films, television shows, and plays. His London stage appearances include Hamlet, the Maniac in Accidental Death of an Anarchist (for which he received an Olivier Award), the lead in Bent, and the National Theatre of Scotland's The Bacchae. On Broadway, he has appeared in The Threepenny Opera, as the master of ceremonies in Cabaret (for which he won a Tony Award), Design for Living and a one-man adaptation of Macbeth. His best-known film roles include his performances in Emma, GoldenEye, the Spy Kids trilogy, Son of the Mask, and X2. Cumming also introduces Masterpiece Mystery! for PBS and appeared on The Good Wife, for which he has been nominated for three Primetime Emmy Awards, two Screen Actors Guild Awards, two Golden Globe Awards and a Satellite Award. A filming of his Las Vegas cabaret show, Alan Cumming Sings Sappy Songs, aired on PBS stations in November 2016.

As of March 2018 he is working at the CBS TV series Instinct (stylized as INSTIИCT) with Bojana Novakovic.

Cumming has written a novel, Tommy's Tale, and an autobiography, Not My Father's Son: A Memoir, had a cable talk show called Eavesdropping with Alan Cumming, and produced a line of perfumed products labelled "Cumming". He has also contributed opinion pieces to many publications and performed cabaret shows, I Bought a Blue Car Today and Alan Cumming Sings Sappy Songs.