This popular name in various Slavic countries and in Italy holds considerable Continental appeal. It is the full name of Ukranian-born rising star Mila Kunis, most noted for her award-winning role in the film Black Swan. Another actress bearing the name is Milena Govitch, of Law & Order.
Milena, which entered the U.S. Top 1000 in 2013 (and is now #798 in 2014) is one of the top names in Poland. Short form Mila has been on the US list since 2006.