Giorgia Gueglio (born 1973) is an Italian singer and founding member of the heavy metal band Mastercastle.

She started singing in 1990, following her passion for singers like David Coverdale, Robert Plant and Ian Gillan.

From 1994 she entered many hard rock and heavy metal bands.

In 2004, she became a member of the gothic metal project Artisluna, featuring the first Labyrinth drummer Mattia Stancioiu, who was also the producer.

Another musician involved in the project was guitar player Pier Gonella, member of Labyrinth and Necrodeath.