Ex-daughter-in-law of Mary Forbes.
Ex-sister-in-law of Brenda Forbes.
Heather witnessed the horrific stabbing murder of her third husband, Broadway, film and TV director Robert B. Sinclair, by a prowler at their Montecito, California home on January 3, 1970. The prowler turned out to be a University of California--Santa Barbara (UCSB) graduate student.
Tested for the part of Melanie in Gone with the Wind (1939), which was given to Olivia de Havilland.
Was the subject of Sonic Youth's 1998 song "Heather Angel" off their "A Thousand Leaves" record