Mariani was born on April 20, 1933 in Tanjung Pagar, Singapore as Siti Mariam Binti Ismail. She was an actress, known for Putus sudah kasih sayang (1971), Labu dan Labi (1962) and Nasib Si Labu Labi (1963). She was married to Alias, Darus and H. M. Rohaizad. She died on December 1, 2015 in Kuala Lumpur, Malaysia.