The "Dabangg" star made her singing debut last year with the independent single "Aaj Mood Ishqholic Hai".
She has now lent her voice to the track "Rajj Rajj Ke" for her upcoming film "Akira".
"I eventually want to have a career in music. I love singing and dancing a lot. Little by little, I want to sing more. I had released 'Ishqholic' and now I am happy my first song for a film has been recorded for 'Akira'," she said.
Composed by Vishal-Shekhar, the promotional track has been sung by Sonakshi, while the film version has been crooned by Nahid Afrin, of "Indian Idol Junior" fame.
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The "Lootera" actress, who was one of the judges on the show, had promised Nahid to offer her a song in her next film.
"I am very happy that what I had promised, through Vishal and Shekhar, it came true. I am really happy for our film because Nahid is supremely talented. She has such a lovely voice," Sonakshi said.
Directed by A R Murugadoss, "Akira" is the remake of 2011 Tamil film "Mouna Guru". The action-thriller features filmmaker Anurag Kashyap in a negative role and also stars Konkona Sensharma.
In the film, scheduled to release on September 2, Sonakshi will be seen as a fearless young woman, doing high-octane stunts.