8. Michele Matheson
When Michele Matheson landed her role as Heather Owens’ best friend on “Mr. Belvedere,” it was the first time she acted professionally. While she was working on “Mr. Belvedere,” she also worked another series for two years, so it was no surprise when the work kept coming after 1990. She’s amassed credits in TV and film since then, the last one a video short that wrapped in 2017.