Jason Michael Isaacs, born on June 6, 1963, is an English actor. He is primarily known for his character actor roles, particularly his portrayals of villains.

Beyond his acting career, Isaacs is also an entertainer. He is a self-taught sax player and singer, having progressed from playing background jazz in bars and restaurants in the 1990s. He now sings and performs with a big band in front of concert hall audiences in his own directed and produced theatre productions across Europe and the UK.