Mystery actor

[Click for a much larger, more mysterious view.]

Do you recognize her? Do you think you recognize her? Leave your best guess in the comments. If necessary, I will add a hint.

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11:50 a.m.: A first hint: this actor is best known for a television role.

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12:50 p.m: A second hint: the actor and that television character have the same first name.

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1:10 p.m.: The answer is now in the comments. That’s Marion Ross as Katy Fuller in Teacher’s Pet (dir. George Seaton, 1958). Ross went on to play Marion Cunningham in Happy Days (1974–1984).

More mystery actors
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[Garner’s Modern English Usage notes that “support for actress seems to be eroding.” I’ll use actor.]