One star of The Nativity was Tatiana Maslany.
Tatiana Gabriele Maslany ( born September 22 , 1985 ) is a Canadian actress . She has starred in television series such as The Nativity , Being Erica , and Heartland . The Nativity (2010 TV series) . The series stars Tatiana Maslany as Mary ; Andrew Buchan as Joseph ; Neil Dudgeon as Joachim ; Claudie Blakley as Anna ; Peter Capaldi as Balthasar ; and John Lynch as Gabriel .