In 1998 Johnny Depp got the role of Raoul Duke in the movie Fear And Loathing In Las Vegas. The character Raoul Duke was based on a novel by Hunter S. Thompson with the same name and in the movie, he and his friend Dr. Gonzo go on an adventure through Las Vegas as they explore it under the influence of psychoactive substances.

The actor and the writer got along really well, so Johnny Depp wanted to do his character who was loosely based on the writer justice. Johnny Depp moved into the basement of Thompson's Aspen house for several months. The writer also let his friend pick some clothes from his wardrobe for shooting.

Johnny Depp spent so much time with his character and got so into it that many of the little tics that the actor adopted stuck with him even in real life and can be noticed in later movies.