Passin Reungwoot, nicknamed A, is a Thai actor. He was in his first film 'Song Rao' when he was just five years old. Passin worked consistently in film and television until the age of twelve when he decided to take a break from the industry to pursue his education. After graduating from Rangsit University, he spent three years taking cameo roles in various dramas and commercials until someone saw his potential and he landed a role in the film 'Tears of the Black Tiger' (2000).