Followed in the footlight footsteps of her sister, who also did two-reel comedies. Moved her way up to good parts in Tod Browning and Keaton pix. Then the downward swoon, ending in small pieces in cheap Westerns.
Her last flick was '33; she died 67 years later, in 2000. Wikipedia:
After her retirement, Day rarely spoke of her years as an actress and never spoke to reporters or granted interviews.