Josep Maria Carreras Coll (Catalan: [ʒuˈzɛb məˈɾi.ə kəˈreɾəs ˈkɔʎ]; born 5 December 1946), better known as José Carreras (/kəˈrɛərəs/, Spanish: [xoˈse kaˈreɾas]), is a Spanish operatic tenor who is particularly known for his performances in the operas of Donizetti, Verdi and Puccini.

Born in Barcelona, he made his debut on the operatic stage at 11 as Trujamán in Manuel de Falla's El retablo de Maese Pedro, and went on to a career that encompassed over 60 roles, performing in the world's leading opera houses and on numerous recordings. He gained fame with a wider audience as one of the Three Tenors, with Plácido Domingo and Luciano Pavarotti, in a series of large concerts from 1990 to 2003. He is also known for his humanitarian work as president of the José Carreras International Leukaemia Foundation (La Fundació Internacional Josep Carreras per a la Lluita contra la Leucèmia), which he established following his own recovery from the disease in 1988.

Carreras was born in Sants, a working-class district in Barcelona. He was the youngest of Antònia Coll i Saigi and Josep Carreras i Soler's three children. In 1951, his family emigrated to Argentina in search of a better life. However, this move abroad proved unsuccessful, and within a year they had returned to Sants where Carreras was to spend the rest of his childhood and teenage years.

He showed an early talent for music and particularly singing, which intensified at the age of six when he saw Mario Lanza in The Great Caruso. The story recounted in his autobiography and numerous interviews is that after seeing the film, Carreras sang the arias incessantly to his family, especially "La donna è mobile", often locking himself in the family's bathroom when they became exasperated with his impromptu concerts. At that point, his parents, with the encouragement of his grandfather Salvador Coll, an amateur baritone, found the money for music lessons for him. At first he studied piano and voice with Magda Prunera, the mother of one of his childhood friends, and at the age of eight, he also started taking music lessons at Barcelona's Municipal Conservatory.

At just eight years old, he also gave his first public performance, singing "La donna è mobile", accompanied by Magda Prunera on the piano, on Spanish National Radio. A recording of this still exists and can be heard on the video biography, José Carreras – A Life Story. On 3 January 1958, at the age of eleven, he made his debut in Barcelona's great opera house, the Gran Teatre del Liceu, singing the boy soprano role of Trujamán in Manuel de Falla's El retablo de Maese Pedro. A few months later, he sang for the last time as a boy soprano at the Liceu in the second act of La Bohème.

Throughout his teenage years, he continued to study music, moving on to the Conservatori Superior de Música del Liceu and taking private voice lessons, first with Francisco Puig and later with Juan Ruax, whom Carreras has described as his "artistic father". Following the advice of his father and brother, who felt that he needed a "backup" career, he also entered the University of Barcelona to study chemistry, but after two years he left the university to concentrate on singing.

Juan Ruax encouraged Carreras to audition for what was to become his first tenor role at the Liceu, Flavio in Norma, which opened on 8 January 1970. Although only a minor role, the few phrases he sang caught the attention of the production's leading lady, the eminent soprano and fellow Catalan, Montserrat Caballé. She asked him to sing Gennaro with her in Donizetti's Lucrezia Borgia, which opened on 19 December 1970. It was his first principal adult role, and the one which he considers to be his true debut as a tenor. In 1971, he made his international debut in a concert performance of Maria Stuarda in London's Royal Festival Hall, again with Caballé singing the title role. Caballé was instrumental in promoting and encouraging his career for many years, appearing in over fifteen different operas with him, while her brother and manager, Carlos Caballé, was also Carreras's manager until the mid-1990s.

During the 1970s Carreras's career progressed rapidly. In late-1971, he won first prize in Parma's prestigious Voci Verdiane competition which led to his Italian debut as Rodolfo in La bohème at the Teatro Regio di Parma on 12 January 1972. Later that year he made his American debut as Pinkerton in Madama Butterfly with the New York City Opera. Other major house debuts followed – the San Francisco Opera in 1973, as Rodolfo; the Philadelphia Lyric Opera Company in 1973, as Alfredo in La traviata; the Vienna Staatsoper in 1974, as the Duke of Mantua in Rigoletto; London's Royal Opera House in 1974, as Alfredo; the New York Metropolitan Opera in 1974, as Cavaradossi in Tosca; and La Scala, Milan in 1975, as Riccardo in Un ballo in maschera. By the age of 28, he had already sung the tenor lead in 24 different operas in both Europe and North America, and had an exclusive recording contract with Philips, which resulted in valuable recordings of several less often performed Verdi operas, notably Il Corsaro, I due Foscari, La battaglia di Legnano, Un giorno di regno and Stiffelio.