Jack Nicholson took his role as The Joker in 1989's 'Batman' so seriously that it scared him, and it helped legitimise the comic book genre.

Legendary actor Jack Nicholson made a rare appearance on his ... co-star opens up about whirlwind romance with the actor in the 80s The Batman actor was seen wearing a rainbow striped shirt ...

Tim Burton's 1989 film Batman saw Jack Nicholson, who played the Joker, become the highest-paid actor in the world with earnings of $60 million, eclipsing stars like Schwarzenegger and Stallone.