Best known to me as Sally on “3rd Rock from the Sun”, Kristen Johnston has joined the cast of writer/director Amy Heckerling’s (Fast Times at Ridgemont High, Clueless) new feature film Vamps. Written and to be directed by Heckerling, Vamps tells the modern day tale of two young beautiful female vampires living the good nightlife in New York until love enters the picture and each has to make a choice that will jeopardize her immortality. Filming will begin next week in Detroit, Michigan. Johnston joins Alicia Silverstone and Krysten Ritter, already on board as two young vampires and Sigourney Weaver, who plays the role of Cisserus, a bloodthirsty “stem” vampire who has created a dynasty. Comedian Richard Lewis was announced last night. Johnston plays Mrs. Van Helsing, a posh British woman who is suspicious of her son’s new love interest Stacey (Ritter).