She is the older sister of Laila Boonyasak and is best known for her role as Noi in Last Life in the Universe.
She was first widely known in 1994 for playing the role of Fah, a nice lovely young woman in TV commercials for Mistine.
[1] Sinitta's younger sister Laila is very famous in Thailand for her film work and modeling career.
Around 2001 Sinitta decided to take an acting/directing course at Srinakharinwirot University, Prasarnmit Campus in Bangkok.
She spent some time as a television host and was taking a Thai cooking class when she was approached by Pen-Ek Ratanaruang for the role of Noi in Last Life in the Universe, a role which kept her from quitting the film business altogether.