Alfonso Sebastián Alegre is a member of the ensemble Los Músicos de Su Alteza and regularly collaborates with groups such as La Tempestad, Al Ayre Español, and the Orquesta Sinfónica de Castilla y León.
Born in Zaragoza in 1974, he is a prizewinner of the Juventudes Musicales de España competition. He has made numerous recordings for various labels. In addition, he works as a translator and has published various works–including crime novels, historical novels, and art history monographs–with publishing houses such as Grijalbo and Electa.