Nicolas "Nyco" Lilliu (born 1987) is a French singer of mixed French-Italian origin. His father is from Terralba, Sardinia and his mother from Brittany.

He is the younger brother of French rock singer Pierrick Lilliu. Lilliu was born in Carspach, near Mulhouse, Alsace. He started very early in music, learning to play the guitar at age 11, and was very much affected by Italian music.