Before the introduction of playback singing in Hindi cinema, actors and actresses themselves used to sing in their own voice. This continued to happen even after the introduction of background music.
This article mentions singers who were/are also actor / actress.
Kundan Lal Sehgal used to sing his own songs with his own acting.
Karan Dewan also used to sing songs in his films himself.
Apart from this, both Noor Jahan and Suraiya have been actresses and singers of their time and used to sing almost all their songs.
Talat Mehmood also acted in a couple of films and also sang.
There is another such singer who also became a hero. He is Shailendra Singh. He became very successful as a singer with the famous songs of the movie Bobby. He played the role of a hero in the film Do Jasoos and also sang his songs.
How can one forget Kishore Kumar ji, a fine actor and superhit singer?
Salma Agha did both acting and playback singing in the film Nikah.
Ayushmann Khurrana sings at least one song is sung by himself in his films.
The rest of the actors sang songs in their voice in a couple of films, including Raj Kapoor, Aamir Khan, Shahrukh Khan, Salman Khan Mehmood, Ashok Kumar Ji, Parineeti Chopra, Sridevi etc. But these None of them can be called a full playback singer.
