Kay Lertsittichai is a Thai actor, vlogger, YouTuber, and model signed under GMMTV. As a teenager, he got the opportunity to become an international exchange student at Guilford High School in Illinois, United States. Later, Kay attended the University of Wisconsin and, in 2019, he graduated with a bachelor's degree in Mathematics with an emphasis on Actuarial Science and a minor in Digital Marketing. He started making YouTube videos back in 2016 on his channel called Kayavine and has more than 1.5 million subscribers as of February 2023.