After watching Jack Nicholson and Heath Ledger portray one of pop culture’s most iconic characters, Jarred Leto was determined to do as good of a job as possible! His preparations were intense and involved him sending weird gifts to his co-stars. The Joker, ahem, Leto, sent Margot Robbie disturbing love letters and a dead rat. Will Smith who played Deadshot was lucky enough to receive bullets in the mail. Nice.
Apparently, therapists had to show up on set to help the actor get through the role as his sanity was beginning to be questioned. Unfortunately for him, Jaoquin Phoenix blew that all out of the park a couple of years later with his version of the Joker.
Nicolas Cage – Ghost Rider
Apparently, Nic Cage's co-stars were pretty afraid of him during the filming of "Ghost Rider ." Portraying the character Johnny Blaze, the actor refused to speak to the other actors between takes, he donned Egyptian symbols to invoke spirits and wore make-up to try to make him look like a corpse.
The whole thing kind of freaked everyone out, making them pretty much stay away from him. We don't blame things. Funnily enough, the actor doesn't even claim to be that much of a fan of the franchise, but clearly, something spoke to him.
Val Kilmer – The Doors
Playing a rockstar is never easy. When Val Kilmer portrayed the Doors frontman, Jim Morrison, he went on a musical journey and learned all about Morrison's song. Seems reasonable. He then went on to learn 50 of the singer's songs. Unfortunately only 15 made it into the final cut.
No wonder he earned himself the name "Jim" on set. He really deserved it.
Daniel Day-Lewis – My Left Foot
Regarded as one of the greatest actors of our time, Daniel Day-Lewis went off the rails in the film "My Left Foot." In the film, he played a disabled hunchback. During the duration of filming, the actor remained in that position, leaving him with two broken ribs by the end of the production.
The Lincoln actor was practically in a state of self-imposed handicap, refusing to come out of character. The crew even had to spoon-feed him.
Heath Ledger – The Dark Knight
Heath Ledger was dynamite as the Joker in "The Dark Knight", so much so that everyone on set was terrified of him. Legendary actor Sir Michael Caine even stumbled over his lines during scenes with Ledger. It would be a regular occasion to find the actor acting like a recluse, drawing disturbing doodles in his dressing or hotel room.
It didn't just stop there. The actor was abusing prescription pills, suffering from insomnia, and depression. The film is regarded as the thing that ultimately sent him over the edge.