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Maksim Chmerkovskiy was Heather Morris's professional partner on "Dancing with the Stars." Morris, known for her role as Brittany S. Pierce on the musical comedy-drama series "Glee," participated in the 24th season of the dance competition show in 2017. Chmerkovskiy, a Ukrainian-American professional dancer and choreographer, has been a regular pro on "Dancing with the Stars" since its second season.