Sellarès began to paint when he was at primary school. He studied music (music theory, piano and guitar) and Art at the School of Applied Arts of Terrassa, which was then part of the Llotja. He is a member of the Asociació Cultural Amics de les Arts (Cultural Association Friends of the Arts) and the Terrassa Chess Club.
After passing the entrance exams, instead of entering the Faculty of Fine Arts of the University of Barcelona, he set up the experimental music group Belmondo and decided to travel to New York.
Throughout his career he has met artists who have contributed to his development, both personally and artistically, such as Eloi Rocamora, Antoni Padrós, Richard Hamilton, Francesca Llopis, Nazario, Perico Pastor, Eugeni Bonet, Toni Riera, Carlos Pazos, among others.
He has exhibited at Sala Parés, Galeria A Punt in Badalona, Galeria H2O and Chez Xefo Art Gallery, among others. He also exhibits in museums such as the Joan Miró Foundation, the Museum of Badalona and the Sala Municipal Soler Palet in Terrasa. The Foundation of the Bank of Sabadell has acquired several of his works.