Mother Marjorie Merriweather Post was heiress to the Post Cereal company; Merrill's childhood winter home was the Mar-a-Lago estate, which was bought by Donald Trump in 1985
Though her family was very wealthy, she supported herself by earning $10 an hour modeling clothes for Vogue magazine
Outside of her successful motion picture work, she also appeared in several popular TV shows such as Bonanza, Batman and Mission: Impossible
Was an early ambassador for and the face of JDRF, the leading global organization funding type 1 diabetes (T1D) research
Created JDRF's annual Rumbough Award for scientific excellence, in recognition of outstanding achievement in diabetes research after the passing of her diabetic son David Rumbough in 1973