Júlia Koroknai (born 11 April 1981), known by her stage name Mya Diamond, is a Hungarian erotic model and former pornographic actress.

The most important thing in Mya Diamond's life has always been and still is her family.

Mya eventually won first place in a contest for German language in Hungary.

When she finished secondary school, she began studying in University and was working in a hotel at the same time.

Several months later, she was offered to work as a model in the pornographic business.