- Date of Birth-December-1,1960
- Birth place-Saptari Distrit,Nepal
- Father- Hare Krishna Jha
- Mother-Bhuwaneshwori Devi
- Education-Studied at P.B. School, Rajbiraj, where he passed his S.L.C. (class 10) and later obtained his intermediate from Ratna Rajya Laxmi Campus, mostly known as RR campus Kathmandu
Udit Narayan began his career in Nepal singing for Radio Nepal as a staff artiste for Maithili and Nepali folk songs. He sang many popular Nepali folk, modern songs on Radio Nepal. His first film playback singing was for Nepali film Sindur. It was a comedy song for famous Nepali comedians GopalRaj Mainali (Chankhe) and Basundhara Bhushal (Nakkali). It was a duet song with Sushma Shrestha — now known as Poornima in Hindi films. After eight years in that role, the Indian embassy offered him the chance to study classical music at a prestigious school in Bombay, Bhartiya Vidya Bhavan, on a music scholarship. He moved to Bombay in 1978.
He got his first break in 1980, when noted music director (composer) Rajesh Roshan asked him to playback for the Hindi film Unees Bees and was given the opportunity to sing with the veteran Mohammed Rafi. He provided playback for a number of films, the most notable being Sannata (1981), Bade Dil Wala (1983) and Tan-Badan (1986). The success story of his career began in 1988 when Anand-Milind gave him the oppportunity to sing all the songs for the successful Bollywood movie Qayamat Se Qayamat Tak, earning him a Filmfare Award. The film also brought actor Aamir Khan, actress Juhi Chawla and playback singer Alka Yagnik to stardom. After the success of Qayamat Se Qayamat Tak, he became one of the leading playback singers in the Indian film industry. He is also hailed as the screen voice of Shahrukh Khan.