Actress Jennifer Garner is pregnant, according to the Associated Press. The “Arthur’’ star and her husband, Boston boy Ben Affleck — who got married in 2005 — are expecting their third child. They already have two daughters, 5-year-old Violet, and 2-year-old Seraphina. Meanwhile, the Hollywood reporter says that Affleck has a signed on to direct “Line of Sight,’’ an action film about a commando squad transporting cargo. Affleck is already on board to direct “Argo,’’ in which he’ll star as a CIA guy who uses a fake Hollywood production to free hostages in Iran.