Gaius Caesar Augustus Germanicus, Roman emperor, known as Caligula or "Little Boots" (A.D. 12-41, reigned 37-41). Son of Germanicus and Agrippina the Elder, through his mother the great-grandson of the emperor Augustus, through his father the great-grandson of Augustus's wife Livia. See the Julio-Claudian Family Tree.
Caligula is the title of a controversal movie in 1980 about the emperor starring Malcolm McDowell, Helen Mirren, Peter O'Toole et al. directed by Tinto Brass, produced by Penthouse magazine. The movie was unrated when shown in theaters because its content was considered pornographic and probably would be rated beyond the hard-core XXX rating at the time.