Ploy Chermarn Boonyasak is a Thai film and television actress and model. She is well known for her role as June / Tang in the movie The Love of Siam.

Her other film roles have included the title ghost character in director Yuthlert Sippapak's horror-comedies Buppah Rahtree and Buppah Rahtree Phase 2: Rahtree Returns. She was also featured in Pen-Ek Ratanaruang's Last Life in the Universe, in which she portrayed the younger sister of the character played by her real-life older sister, Daran Boonyasak. In 2001, when she was just 18, she played a teen mum in the drama Na Tang Baan Raek (The First Window).