From Muppet Wiki

Phoebe Cates (b. 1963, birth name Phoebe Belle Katz) is an American film actress best known for her roles in several teen films, most notably Fast Times at Ridgemont High and Gremlins. At the height of her popularity, Harper's Bazaar named her as one of America's 10 Most Beautiful Women of 1984.

She appeared with husband Kevin Kline and Count von Count in a sketch about measuring on Sesame Street; the segment was included in Sesame Street All-Star 25th Birthday: Stars and Street Forever!.