Conversation so far:
Did Helen Mirren have any movies in 2015?
In 2015, Helen Mirren reunited with her former assistant Simon Curtis on Woman in Gold
what was Woman in Gold with Helen Mirren about?
Woman in Gold with Helen Mirren is the story of Jewish refugee Maria Altmann, who fought the Austrian government to be reunited with Gustav Klimt's painting of her aunt

Question: who did she co-star with?
Self-contained rewrite: who did Helen Mirren co-star with in Woman in Gold?