Rai Thistlethwayte is an Australian rock, pop and jazz musician and songwriter. Thistlethwayte is an accomplished pianist, guitarist, and vocalist. He is the lead singer, rhythm guitarist, and primary songwriter in the Australian pop rock band Thirsty Merc. From 2004, Thirsty Merc released a string of hits in the Australian charts including "In the Summertime", "Someday, Someday", "20 Good Reasons", "Emancipate Myself", "My Completeness", "When the Weather Is Fine" and "Mousetrap Heart". He is currently based in Los Angeles. As a solo artist, Thistlethwayte performs under the name 'Sun Rai'.