Former SNL duo Tina Fey and Amy Poehler will co-star in the comedy “Baby Mama,” which Michael McCullers will write and direct. McCullers, who with Mike Myers wrote the Austin Powers sequels “The Spy Who Shagged Me” and “Goldmember,” makes his directing debut on the film. Fey plays Kate, a single and successful executive at Happy Planet (a Whole Foods-type grocery store) whose desire to have a child and keep her career leads her to hire a surrogate (Poehler). Eight weeks of principal photography begins April 30 taking in locations around New York.