After 1935, Myrtil's career decidedly shifted towards film, although she never left her live theatre roots.
Some of her other film credits are Kitty Foyle (1940), Out of the Fog (1941), I Married an Angel (1942), Yankee Doodle Dandy (1942), The Palm Beach Story (1942), Uncertain Glory (1944), Devotion (1946), The Fighting Kentuckian (1949), and as Madame Darville in Alfred Hitchcock's Strangers on a Train (1951).