yes, it was. one of her costars was
Victor Garber
I Had Three Wives
David Faustino
Married…With Children.
Katie Segal
Seven Rules for Dating My Teenage Daughter, also known as Seven Rules.
(I should probably call you on that - it was 8 not 7 - but then no one called me on misspelling Ms Segal’s name so)
John Ritter
Three’s Company
Norman Fell
The Ropers. Do spin-offs count, if they’re not the name of the actor?
And you were right. It IS “Eight Simple Rules…” I heard the “S” sound in my head, and forgot that the word “simple” was in there.
yes spinoffs count - but you have to wait a whole page (50 posts) to use them (see rules)
so we’re still working off
Norman Fell
Teachers Only
Jean Smart
The lovely and talented Lynn Redgrave.
Voice of Dr. Possible on Kim Possible.
And curse you for answering so quickly that Lynn Redgrave isn’t in play.
Nancy Cartwright
sorry, dude 
The Simpsons
Julie Kavner
Rhoda
Valerie Harper.