Kaewsai Crystal is a Thai-American actor and announcer from Bangkok. Her mother is Thai and her father is American. She has a degree in journalism from Thammasat University. In 2013, she was a drum major for the 69th Chula–Thammasat Football match.

Since 2013, Kaewsai has been signed under Channel 7. She was previously an artist under Channel 3 from 2008 to 2012.