Urich again worked with Julie Andrews in the film Hawaii and, at 16, traveled across the country to star in the Broadway play We Have Always Lived In The Castle with Shirley Knight. The production opened at the National Theatre in Washington, D.C., and showed for a lengthy run at the Ethel Barrymore Theater in New York City.

Heather guest starred in several television series throughout the 1970s and '80s and did several television pilots and movies for television, including Tail Gunner Joe with Peter Boyle and The James Dean Story with Michael Brandon and Amy Irving. She starred in the popular cult favorite SSSSSSS with Strother Martin and Dirk Benedict, in the popular series Logan's Run with Gregory Harrison, and in the film Piranha with Bradford Dillman.

Heather met her late husband, Robert Urich, while acting with him in a Libby’s Corned Beef Hash commercial. Heather guest starred with Urich in S.W.A.T., Vega$ and Spenser For Hire, as well as many other television shows and a theatrical film, "Endangered Species." The couple also co-starred in theatrical productions, including The Hasty Heart, a production at the Burt Reynold's Playhouse, in Jupiter, Florida. The play achieved substantial acclaim, including a run at the John F. Kennedy Center for the Performing Arts, in Washington, DC, with President and Mrs. Ronald Reagan in attendance.

Heather appeared in Playboy in the 1970s. She did full frontal nudity for the August issue in 1973.

Heather is an ovarian cancer survivor and lives in Los Angeles with her three children, Ryan (30), Emily (28), and Allison (11). She also has two grandchildren, Michelle (born 2004) and Lana (born 2005).

She works with the Urich Fund for Sarcoma Research at the University of Michigan Comprehensive Cancer Center.