Barbara Ann Luna (born March 2, 1939), also stylized as BarBara Luna, is an American actress from film, television and musicals. Notable roles include Makia in Five Weeks in a Balloon and Lt. Marlena Moreau in the classic Star Trek: The Original Series episode "Mirror, Mirror". In 2004 and 2010. she appeared in the first and sixth episodes of Star Trek: New Voyages, a fan-created show distributed over the Internet (retitled Star Trek: Phase II in 2008).

She played Gaby Christian in the original series episode "It Crawled Out of the Woodwork".