She appeared in five Will Rogers comedies, including Jubilo, Jr. (1923) and Going to Congress (1924), as well as in Charley Chase shorts like Sweet Daddy (1924), The Family Entrance (1925), and His Wooden Wedding (1925).

Her versatility allowed her to work with some of the leading film artists of the decade: Ronald Colman and Vilma Banky in The Dark Angel (1925), John Ford in Thank You (1925), Norma Shearer and Renée Adorée in Excuse Me (1925), Leatrice Joy in Hell's Highroad (1925), Ivan Mozzhukhin (notable for being his only appearance in an American film) and Mary Philbin in Surrender!

[5] Despite this, her career as a child actress ended the same year, with Little Mickey Grogan being her last silent film and her only movie to feature her in a starring role (alongside Frankie Darro).

"[8] In 1932, she teamed up with her sister Peggy and started putting on performances that included dancing, singing, acrobatics, and playing instruments.

"While Peggy retired permanently from performing, Lassie returned to Hollywood in 1941 with her husband Johnny Brent, a former Dixieland drummer whom she had married in 1938, and who was employed as a musician for studio orchestras.

She danced in City of Missing Girls (1941) and in the early musicals Donald O'Connor made at Universal (Top Man and Mister Big in 1943 and Patrick the Great in 1945), and had a bit part in George Cukor’s Gaslight (1944).

"[9] Lassie later went on to work as a dance teacher at the Ashram Health Spa near San Diego, where many known stars were students, including Renée Zellweger.