Game of Thrones

The character Joffrey Baratheon is modeled after the Roman emperor Caligula who was reputed to be extremely cruel and sadistic during his four-year reign.

In the year 2012, over 160 baby girls in the U.S. were legally named "Khaleesi", after the character in the show, although it is not the character's name (Daenerys) but a title.

Jack Gleeson (Joffrey) received a letter from author George R.R. Martin after the show aired, stating "Congratulations on your marvelous performance, everyone hates you!"