David Thewlis, born David Wheeler, is a British actor, director, and screenwriter. Trained at the Guildhall School of Music and Drama, he gained international recognition in 1993 with Mike Leigh's film *Naked*, for which he won the Best Actor award at the Cannes Film Festival for his intense portrayal of the protagonist, Johnny. He is best known to the general public for his role as Professor Remus Lupin in the *Harry Potter* film series, a character he portrayed in five films. His eclectic filmography includes titles such as *Seven Years in Tibet*, *The Boy in the Striped Pyjamas*, *War Horse*, and *Wonder Woman*, in which he plays the antagonist, Ares. On television, he has received widespread acclaim and nominations for Golden Globe and Emmy Awards for his performance as V.M. Varga in the third season of the series *Fargo*. His career is characterized by a remarkable versatility, allowing him to move effectively between arthouse cinema and large commercial productions.