SNL gal, naturally. And, FYI to whoever keeps doing this, 4'12" IS 5'0"! (Huh. It literally flipped on me as soon as I entered this. Or, apparently, the computer caught it. In the entry fields it still reads as 4'12". Weird!)
Incidentally, while she has had a large # and wide range of roles during and after that landmark TV property, she is probably still best known today for her signature skit, "Debbie Downer"!