Rahat Fateh Ali Khan (Punjabi: راحت فتح علی خان, Punjabi pronunciation: [ɾɑːɦət̪ fəte(ɦ) əliː xɑːn]; born 9 December 1974) is a Pakistani Punjabi singer, primarily of Qawwali, a form of Sufi devotional music. Khan is one of the most popular and highest paid singers in Pakistan. He is the nephew of Nusrat Fateh Ali Khan, the son of Farrukh Fateh Ali Khan and the grandson of Qawwali singer Fateh Ali Khan. In addition to Qawwali, he also performs ghazals and other light music. He is also well-known as a playback singer in the Hindi cinema and Pakistan film industry.

Rahat was born into a Punjabi family of Qawwals and classical singers in Faisalabad, Punjab, Pakistan. He is the son of Farrukh Fateh Ali Khan, grandson of Fateh Ali Khan and nephew of Qawwali singer Nusrat Fateh Ali Khan.

Rahat displayed an adoration for music from a very young age and was often found to be singing with his uncle and father, as young as three. From an age of seven, he was already being trained by his uncle Nusrat Fateh Ali Khan in the art of singing Qawwali.

Rahat performed publicly for the first time in 1979 at the age of nine, on the death anniversary of his grandfather. Since he was fifteen, he was an integral part of Nusrat Fateh Ali Khan's well-known qawwali group and toured the United Kingdom with his uncle in 1985. He also performed solo songs at different concerts, in addition to fulfilling his roles in the Qawwali group. He made his Bollywood playback singing debut with the song "Mann Ki Lagan" from the movie Paap (2003), a composition by Nusrat Fateh Ali Khan that was originally recorded in Pakistan for an unreleased album.

In 2011, after his release from a high-profile Customs case in India, Rahat was touring the US where one of his promoters, Chitresh Srivastava, died in a car crash. In April 2012, Rahat toured in the UK, performing at Wembley Arena and the Manchester Arena, playing to a combined audience of over 20,000 people and creating a record of maximum ticket-sales.

The song "Zaroori Tha" from the album Back 2 Love (2014) became the first original non-film music video from the Indian subcontinent to cross 100 million views on YouTube after two years, and 200 million views within three years of its release. Eventually it reached a billion views. He is also touring with Leo Twins from Nescafé Basement regularly.

In 2018, the daughter of Nusrat Fateh Ali Khan said she intended to take legal action against copyright infringement of singers who sing her father's songs. To this, Rahat responded saying he was the adopted successor of Nusrat and that he doesn't need anyone's permission to sing his songs.

In a subordinate role with his uncle Nusrat Fateh Ali Khan, working in collaboration with Eddie Vedder, of the American rock band, Pearl Jam, Rahat contributed to the soundtrack of the 1995 Hollywood film, Dead Man Walking. In 2002, he worked on the soundtrack of The Four Feathers in collaboration with the American composer of orchestral and film music, James Horner. In 2002, Rahat guested with The Derek Trucks Band on the song "Maki Madni" for Trucks' album, Joyful Noise. In 2006, his vocals were featured on the soundtrack of Mel Gibson's Apocalypto. In 2008, he sang the song "Teri Ore" for the movie Singh Is Kinng alongside Shreya Ghoshal.