He studied law and graduated at age 23, but soon he decided to pursue acting. He debuted in the theatre play
Por los pelos (1992). He had small roles in films and theater. In 1999 he started working on the series
Siete Vidas as a helper and assistant director. The producer chose him for episodic character (Gonzalo, the owner of the bar) and that character became one of the main ones for seven years. Finished
Siete Vidas, De Castro starred
Doctor Mateo (2009–2011), the Spanish remake of
Doc Martin, for which he received several awards for best television actor in 2009 and 2010. He has been boyfriend of the actresses
Nathalie Poza (until 2008) and
Natalia Verbeke (2010–2013). ==Career==