Klim Sergeyevich Kostin (Russian: ???? ????????? ??????; born 5 May 1999) is a Russian professional ice hockey winger who currently plays with the St.
Louis Blues of the National Hockey League (NHL).
Considered a top prospect for the 2017 NHL Entry Draft, Kostin was selected 31st overall by the Blues.
Kostin previously played for Dynamo Moscow of the KHL, first playing in their junior system, before financial issues led to all the players being released in 2017.
Internationally Kostin has played for the Russian national under-18 team at several tournaments.