Karen Kain was born in Hamilton, Ontario, Canada 1951. She joined National Ballet of Canada 1969 and was promoted to principal 1971. She was also a guest artist with Petit's Ballet de Marseille. Partnered with Frank Augustyn and Rudolf Nureyev.

Repertoire includes:
Swan Lake, Coppelia, Giselle, Sleeping Beauty.

Soloist silver medal at Moscow International Ballet Competition 1973, and first place with Frank Augustyn in the Pas de Deux category.