A. R. Rahman was born on January 6, 1966 in a musically affluent Tamil family. His father R. K. Shekhar, was a Chennai based composer and conductor for Malayalam films. Rahman lost his father at a very young age and his family rented out musical equipment as a source of income. He was raised by his mother Kareema (Kashturi), who was from a Muslim family. During these formative years, Rahman served as a keyboard player and an arranger in bands such as "Roots", with childhood friend and percussionist Sivamani, John Anthony, Suresh Peters, JoJo and Raja. Rahman is the founder of the Chennai-based rock group, "Nemesis Avenue". He played the keyboard and piano, the synthesizer, the harmonium and the guitar.
He was very curious and interested in the synthesizer, he says, it was the “ideal combination of music and technology". He began early training in music under Master Dhanraj. At the age of 11, he joined, as a keyboardist, the troupe of Ilaiyaraaja, one of many composers to whom musical instruments belonging to Rahman's father were rented. Rahman later played in the orchestra of M. S. Viswanathan and Ramesh Naidu, accompanied Zakir Hussain, Kunnakudi Vaidyanathan and L. Shankar on world tours and obtained a scholarship to the Trinity College of Music where he graduated with a degree in Western classical music. His film scoring career began in the early 1990s. He has won thirteen Filmfare Awards, four National Film Awards, a BAFTA Award, a Golden Globe and two Academy Awards. He is married to Saira Banu and has three children, Khadijah, Rahima, and Aameen. Rahman is the uncle of composer G. V. Prakash Kumar, who is the son of Rahman's elder sister, A. R. Reihana. He is related to south indian actor Rahman. Rahman is a practising Sufi Muslim. He had become an atheist as a result of childhood struggles, he eventually converted in to Islam in 1989, the religion of his mother's family.
He is very devoted to his mother. During the Oscar Award, he paid her a tribute saying: "There is a Hindi dialogue 'mere pass ma hai' which means even if I have got nothing I have my mother here. Rahman is involved in various charitable causes. In 2004, he was appointed as the Global Ambassador of the Stop TB Partnership, a project by WHO. He has shown support to charities including Save the Children, India, and worked with Cat Stevens / Yusuf Islam for his song "Indian Ocean" . The song featured a-ha keyboard player Magne Furuholmen and Travis drummer, Neil Primrose. The proceeds of the song went towards helping orphans in Banda Aceh, one of the areas worst affected by the 2004 Indian Ocean Tsunami. He produced the single "We Can Make It Better" by Don Asian alongside Mukhtar Sahota. In 2008, Rahman opened his KM Music Conservatory partnered with Audio Media Education facility to tutor and train aspiring musicians in vocals, instruments, music technology and sound design. The conservatory – with preeminent musicians on its panel and a newly founded symphony orchestra – is located near his studio in Kodambakkam, Chennai, offering courses at Beginners, Foundation and Diploma level. Rahman composed the theme music for a short film for The Banyan in 2006, in aid of destitute women in Chennai. In 2008, Rahman, along with percussionist Sivamani created a song titled "Jiya Se Jiya", inspired by the Free Hugs Campaign and promoted it through a video shot in various cities in India.