Dia

Dia, also known as Princess Dia, is a fictional slave featured in the 1976 adventure film At the Earth's Core. She was played by actress Caroline Munro. The character was created by director Kevin Connor and writer Milton Subotsky, based on concepts originally developed author Edgar Rice Burroughs.

Dia was an inhabitant of a mysterious lost world located near the Earth's core. She was a princess and a slave of the Mahars. During the 19th century, a wealthy financier named David Innes journeyed to the Earth's core along in Doctor Abner Perry's Iron Mole device, whereupon he met and fell in love with Princess Dia. He fought to rescue her from the bonds of slavery.