GROSSE CASTING COUPS: Darren Star is calling on his friends to help his struggling WB satire Grosse Pointe. Kristin Davis, who appears on Star's saucy HBO series Sex and the City, will play herself in an episode scheduled to air during February sweeps. Additionally, the New York Daily News reports that Jason Priestley, who played Brandon on the Star-created Beverly Hills, 90210, will direct and star in a Grosse Pointe episode, also set to air in February.