I personally would have no problem with a non-Jewish person using a modern Hebrew name.
But
Talia is not solely a "Jewish" or modern Hebrew name. It has other derivations. It can be a short form of
Natalia, and in the case of the Italian-American actress
Talia Shire, it is a shortened form of her mother's given name,
Italia:
http://www.talia-shire.com/biography.htm