García was born on 14 March 1997 in El Prat de Llobregat, Catalonia. He began formal training in vocals and trombone at the age of seven. García is also a self-taught guitarist, drummer, and keyboardist. He received musical training at the Unió Filharmònica del Prat. García is studying for a degree in audiovisual communication, as well as being in his third year of a higher degree in music and jazz and modern music studies at the Taller de Músics, a music school in Barcelona.

In 2016, García participated in season four of talent show La Voz, the Spanish version of The Voice. He performed John Mayer’s “Waiting on the World to Change” in the Blind Auditions, but none of the coaches turned for him. Also in 2016, García released the self-produced and self-published acoustic album Inblack (Volume One).

In 2017, García auditioned for series nine of reality television music competition Operación Triunfo. On 23 October 2017, he was selected to enter the show’s “Academy”. On 29 January 2018, during the special live show “Gala Eurovisión” of Operación Triunfo, he was selected by public vote to represent Spain in the Eurovision Song Contest 2018 along with his then girlfriend Amaia Romero, with the song “Tu canción”. During the finale of Operación Triunfo 2017 on 5 February 2018, García finished in fourth place.

Amaia and Alfred were the second to perform at the Eurovision final, held on 12 May 2018 in Lisbon, Portugal. They placed twenty-third out of the 26 participating countries with 61 points: 43 from the professional juries and 18 from the televote.

Two days after returning from the Eurovision Song Contest, García started to record 1016, his first studio album with a major record label, Universal Music Spain. The album was preceded by the 1016 Is Coming tour in festivals across Spain in Summer 2018. In addition, García performed at a special charity concert of Operación Triunfo 2017 at the Santiago Bernabéu Stadium in Madrid on 29 June 2018, and made special guest appearances at concerts by David Bisbal or Love of Lesbian, among others.

“De la Tierra hasta Marte”, the first single from 1016, was released on 5 December 2018. The album was released on 14 December 2018 and debuted at number 2 on the Spanish Albums Chart. In support of his debut studio album, 1016, García embarked on the 1016 Tour, which began on 28 February 2019 and ended on 9 November 2019.