All hail Saoirse Ronan! As the titular star of Josie Rourke’s absorbing mostly historical drama Mary Queen of Scots (B), the fierce young actress adds to her sterling repertoire of strong female roles and brings pulse pounding verve to what could have been a dull period piece. The actress is commanding and imaginative and summons viewers to follow her anywhere. Eschewing some of the wilder audacity of another costume drama on the market right now, Rourke’s entertaining film is straightforward in plot and purpose, but it’s a fitting and feminist take on what royal women have to do to maintain power even as sovereigns surrounded by manipulative men. Under pancaked prosthetics, Margot Robbie successfully disappears into the role of Elizabeth I of England, rival to the throne versus Ronan’s Mary Stuart of Scotland. The film gets high marks for inclusive casting and upping stakes often as the women contemplate various pathways to extend their respective royal bloodlines. In addition to the strong women, Jack Lowden, David Tennant, Guy Pearce, Adrian Lester and Ismael Cruz Córdova shine in the ensemble. The film handles a few pivotal sequences a bit oddly, but overall it’s rousing.