Randhawa took the extreme step at her home in Juhu, a western suburb of Mumbai, police said. A maid found her body Wednesday night and alerted police.
The dusky 30-year-old ex-Gladrags model acted in tele-shows like Special Squad, Kohinoor, Hip Hip Hurray and Cats. Unlike her screen appearances, Randhawa was a recluse.
In a suicide note, Kuljeet said she was ending her life, as she was unable to cope with life's pressures, police said.
Known for her role in serials like "Kohinoor" and "Special Squad", Randhawa was a well-known face in the advertisement world and had acted in several commercials for companies like Pepsi and Whirlpool.
In "Kohinoor", she played the character of Irawati Kohli, who has a doctorate in ancient history and archaeology with a special leaning towards India.
Randhawa's suicide has brought back memories of the suicide by model turned VJ Nafisa Joseph in 2004.