Rai Thistlethwayte is an Australian rock, pop and jazz musician and songwriter. Rai is an accomplished pianist, guitarist, and vocalist. He is the lead singer and primary songwriter in the Australian pop rock band Thirsty Merc.

Rai performs solo under the artist name ‘Sun Rai’, and his first tour as a solo artist was in April/May 2009. Since then he has enjoyed using his rep as a solo artist to experiment around the jazz-pop genre.