Charlie Kaufman wrote which acclaimed fantasy film in 1999 journeying into an actor's mind?
Charlie Kaufman:  He wrote the films "Being John Malkovich" (1999), "Adaptation" (2002), and "Eternal Sunshine of the Spotless Mind" (2004). Being John Malkovich:  The film follows a puppeteer who finds a portal that leads into Malkovich's mind.
Being John Malkovich