Ryan Phillippe's coziness with his current leading lady, Stop Loss costar Abbie Cornish, may be what did in his marriage to Reese Witherspoon. After incriminating Blackberry missives between him and the 24-year-old Aussie were discovered by Reese, "Ryan admitted it was true and said, 'We need to just end this.' Reese literally had no choice," an anonymous source tells Us Weekly.... Us also reports that Studio 60's Matthew Perry is romancing The Class' Lizzy Caplan, whom he was introduced to two months ago by Friend Matt LeBlanc.... Jason Bateman and his wife of five years, Amanda Anka, welcomed their first child, a girl named Francesca Nora, on Saturday, says People.