Career
She has acted in numerous lakorn (Thai soap operas) as well as films and theatrical productions. In 2007, she starred in the critically acclaimed The Love of Siam, and also acted in a revival of the stage production, Banlangmek: The Musical. In 2013 remake of Khu Kam, Sinjai portrayed Thanphuying Louisiana-iat Phibunsongkhram, wife of Field Marshal Plaek Phibunsongkhram, former Prime Minister and military dictator.