He is best known for his roles in Rías Baixas (2003–2005), Maridos e mulleres (2006–2008), Father Casares (2014–2015) and Gondar (2009), at a local level in Galicia. He is also known for playing characters such as Diego Murquía/Adrián Vera Celande in Gran Hotel.
In 2018, he was chosen as "International Star of the Year" by GQ Turkey magazine. Alonso also co-starred in Diablo Guardian, Amazon Prime Video’s first drama series in Latin America, which was released in May, 2018.
Alonso studied at the Royal School of Dramatic Arts (RESAD) and Teatro de la Danza (Theatre of Dance).
Awards and nominations
|2009||Mestre Mateo Awards||Best Actor||Padre Casares||Nominated|
|2014||Best Supporting Actor||Gran Hotel||Nominated|
|2018||Award of the Spanish Actors Union||Television: Supporting Performance, Male||Money Heist||Won|
|Fotogramas de Plata||Best TV Actor||Nominated|