Guillermo "Willy" Alfonso Bascuñán Dockendorff (born 19 November 1942, in Viña del Mar), is a Chilean composer and actor.

", which was the first stereo album and conceptual album recorded in Chile, whose song "Los viejos estandartes" (lit: The old standards), with lyrics by Jorge Inostroza[3] and popularized by Los Cuatro Cuartos, which was a musical group he belonged to,[4] would later become the official anthem of the Chilean Army.

In 2005 he released the CD entitled Soy del Sur, in which he sings together with Ginette Acevedo, Antonio Zabaleta and various Chilean musicians.

That same year, he composed "Al 7° de Línea: Segunda Edición, La Nación en Armas".

[8] Inspired by the arrest of Augusto Pinochet in London, he composed the song "Carta a los chilenos" (lit: Letter to Chileans) in his honor.