You may know actress Elizabeth McGovern from her role as Countess of Grantham Cora Crawley from the aristocratic English courtyards of PBS's "Downton Abbey." But, McGovern is once again partnering with PBS in the upcoming roaring twenties period movie, "The Chaperone," based on the bestselling historical fiction novel about the real life of 1920s movie star Louise Brooks.

In the film, McGovern plays stuffy Midwesterner Norma, who chaperones the 15-year-old Brooks, played by Haley Lu Richardson, during a trip to New York City at the height of flapper girls and speakeasies. Throughout her journey, Norma has to come to terms with the juxtaposition of the puritan morality of Wichita, Kansas, and the the fast paced moral ambiguity of New York in the 1920s.

McGovern joined Boston Public Radio to discuss the film, which opens in Boston on April 12th, and of course the upcoming Downton Abbey movie.