Una is an American-British-Canadian drama film directed by Benedict Andrews based upon the play "Blackbird" by David Harrower, who also wrote the film's screenplay. It stars Rooney Mara, Ben Mendelsohn, Riz Ahmed, Ruby Stokes, Tara Fitzgerald, Natasha Little, and Tobias Menzies.
Can we infer the following?
Tara Fitzgerald is playing the leading role in Una.
It's impossible to say