Efremova was born in 1970, in Novosibirsk, Soviet Union (now Russia).
[3] She was a member of the St. Petersburg State Theatre for eleven years.
Efremova moved to the United States for school, and received a master’s degree in 1997 in acting from the David Geffen School of Drama at Yale University.
[citation needed] She has appeared on Broadway in a touring production of Uncle Vanya, as Helena; and the touring production of Vanya and Sonia and Masha and Spike, as Cassandra.
[5][6] Efremova has appeared in television series in the genres of drama, crime, and detective.