It appears that Zoe Saldana and Mark Ruffalo will be around town in April and May. Casting notices went up over the weekend for “Infinitely Polar Bear,” a family drama about a man with bipolar disorder and his relationship with his wife. CP Casting is on the hunt for young women to play Saldana and Ruffalo’s children. Vulture reported last year that the movie will be directed by screenwriter Maya Forbes , who co-wrote “Monsters vs. Aliens” and the adaptation of Plainville writer Jeff Kinney ’s “Diary of a Wimpy Kid: Dog Days.” Saldana will just miss her “Star Trek” costar Zachary Quinto , who stars in “The Glass Menagerie” at the American Repertory Theatre in Cambridge through March 17. The movie might put the actress in town with her ex-boyfriend, Bradley Cooper. He’s expected to shoot his new David O. Russell film around town this spring. Speaking of Cooper, he was just in Washington, D.C., with former US Representative Patrick Kennedy to discuss how his Oscar-nominated film “Silver Linings Playbook” has influenced people’s perceptions of mental illness. “Silver Linings” is based on a book by Massachusetts writer Matthew Quick. .