As the Seegar sisters started acting and singing, Frank Seegar left teaching to open a hardware store in efforts to support his daughters' growing singing and acting pursuits.

[1] Miriam Seegar made her film debut in 1928 in The Price of Divorce, in which she starred alongside Frances Day and Rex Maurice.

In 1953, she received her ASID certification and began working as an interior decorator, first with Harriet Shellenberger and later on her own.

In 2000, at the age of 93, Seegar appeared in the documentary I Used to Be in Pictures, which featured commentary from many of her contemporaries.

On her 102nd birthday she sailed from Southampton to New York on the RMS Queen Mary 2 and back again.