Serge Gainsbourg child Charlotte Gainsbourg
In mid-1968 Gainsbourg fell in love with the younger English singer and actress Jane Birkin, whom he met during the shooting of the film Slogan (1969). In the film, Gainsbourg starred as a commercial director who has an affair on his pregnant wife with a younger woman, played by Birkin. Gainsbourg also provided the soundtrack and dueted with Birkin on the title theme "La Chanson de Slogan". The relationship would last for over a decade. In July 1971 they had a daughter, Charlotte, who would become an actress and singer. Although many sources state that they were married, according to Charlotte this was not the case.  After filming Slogan, Gainsbourg asked Birkin to re-record "Je t'aime..." with him. Her vocals were an octave higher than Bardot's, contained suggestive heavy breathing and culminated in simulated orgasm sounds. Released in February 1969, the song topped the UK Singles Chart after being temporarily banned due to its overtly sexual content. It was banned from the radio in several other countries, including Spain, Sweden, Italy and France before 11pm. The song was even publicly denounced by The Vatican. It was included on the joint album Jane Birkin/Serge Gainsbourg, which also contained "Élisa" and new recordings of songs written by other artists including "Les sucettes", "L'anamour" and "Sous le soleil exactement". In 2017, Pitchfork named it the 44th best album of the 1960s. He and Birkin would share the screen in another Gainsbourg-scored film, Cannabis (1970), in which he played an American gangster who falls in love with a girl from a wealthy family.
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