Chai was born on Koh Samui, a tiny island off the East Coast of Thailand. He relocated with his mother Sandra Hansen and his younger sister Sarah Romruen to the South East of Queensland, Australia at the age of 7. Chai completed his HSC in 2007. He went on to win a scholarship in performing arts and finished the Diploma in 2011. On the 8th of May 2012, JMS productions announced that Chai was to play Zac Blakely in the international hit series Mako Mermaids, his first ever lead in a television series which is now on its 3rd season.