The music for the song was composed by Franck Pourcel and Paul Mauriat, with some adaptions by Arthur Altman. Frank Pourcel used the pseudonym J W Stole and Paul Mauriat used the pseudonym Del Roma. Franck Pourcel first recorded the song as an instrumental in 1961, titled ‘Chariot’. The most well known version of the song was by American singer Peggy March in 1963, with lyrics written by American lyricist Norman Gimbel. The singer was fifteen years old at the time. Her version of the song reached No.1 in Australia, Canada, Hong Kong, Israel, South Africa, Uruguay, and the USA. It was in the USA that it remained at No.1 on the Billboard Hot 100 Chart for three weeks and also reached No.1 on the Billboard Hot R&B Singles Chart, making the 15-year-old the youngest female artist to have a chart-topping single in that country.
Born Margaret Annemarie Battavio, ‘Peggy’ was discovered singing at her cousin’s wedding and was introduced to record producers Hugo & Luigi. They gave her the nickname ‘Little Peggy March’ because she was 4ft 10in (1.47 m) tall, thirteen years old when they first met her, and the song she performed for them was called ‘Little Me’, and her birthday was in March.
‘I Will Follow Him’ was used in the 1992 musical comedy film ‘Sister Act’, which starred American actress Whoopi Goldberg: https://www.youtube.com/iwillfollowhim/sisteract.