For decades, Nicholson has been one of the most highly-admired and respected movie stars in Hollywood. Just like any actor though, it wasn’t always an easy ride racing up to the top.Many people also wonder, is Nicholson off-screen that much different than his chaotic and agitated on-screen persona?Let’s dive into what his life as a big-time superstar celebrity is like, including behind-the-scenes secrets, his family and look-alike grandson, and whether he’s actually out of retirement or not.