Renārs Kaupers, artistic name Reynard Cowper (born 1 September 1974 in Jelgava) is a Latvian pop singer and songwriter.

He is the lead singer of the Latvian pop/rock band Brainstorm, which won third at the Eurovision Song Contest 2000 with their song "My Star". He hosted the Eurovision Song Contest 2003 in Riga, Latvia, with co-host Marija Naumova (stage name Marie N), and also hosted Congratulations, the Eurovision 50th anniversary concert in Copenhagen, Denmark, with Katrina Leskanich.