AceShowbiz -

The flow of Hollywood names coming for "Baby Mama" still runs smoothly for sure. Following the inclusion of Dax Shepard last month, Greg Kinnear and Maura Tierney have both landed deals to take part in the comedy, set to come out from Universal Pictures' pit.

Toplined by "SNL" veterans Tina Fey and Amy Poehler, the flick focuses on a single woman (Fey) whose desire to have a child and keep her career leads her to hire a surrogate (Poehler). Kinnear is billed to portray a proprietor of a local fresh juice shop who becomes close with Fey's character while Tierney will become Fey's confident, conventional sister who supports her choice.

First time-helmer Michael McCullers is onboard to direct from the script he himself wrote with Sigourney Weaver also starring. Lorne Michaels and John Goldwyn are producing while Jill Messick is serving as executive producer.