Mehdi Hassan Khan (Urdu: مہدی حسن خاں) 18 July 1927 – 13 June 2012) was a Pakistani ghazal singer and playback singer for Lollywood. Widely considered one of the greatest and most influential figures in the history of ghazal singing, Hassan is referred to as the "Shahenshah-e-Ghazal" (Emperor of Ghazal). Known for his "haunting" baritone voice, Hassan is credited with bringing ghazal singing to a worldwide audience. He is unique for his melodic patterns and maintaining integrity of the ragas in an innovative way.

Born into a family of Kalawant musicians, Hassan was naturally inclined towards music from a young age. He influenced generations of singers from diverse genres, from Jagjit Singh to Parvez Mehdi. He earned numerous awards and accolades during his lifetime and remained a leading singer of Pakistani film industry along with another contemporary playback singer Ahmed Rushdi, and it is estimated that Hassan sang for over 300 films during his career. For his contributions to the arts, Hassan was awarded with the Nishan-e-Imtiaz, Tamgha-e-Imtiaz, Pride of Performance, and Hilal-e-Imtiaz by the Government of Pakistan.