Celebrity Is Ryan Phillippe's Ex-Girlfriend Pregnant with His Child? That's what Alexis Knapp is telling friends, and a source says the actor would "take responsibility" if true By People Staff Published on March 14, 2011 02:25 PM Share Tweet Pin Email Photo: Wireimage; Globe Photos Just as things are heating up again between Ryan Phillippe and Amanda Seyfried comes a potentially serious complication. Alexis Knapp, an actress who dated Phillippe last summer, is pregnant and, a source says, “Alexis has told friends that the child is Ryan’s.” The baby is said to be due in June. Ryan Phillippe’s Pregnant Ex Not Asking Him for ‘Help’ Reps for Knapp and Phillippe did not have any comment. But the source tells PEOPLE that “Ryan is aware of the situation [and] totally prepared to take responsibility should the child be his.” Phillippe, 36, who has two children with ex-wife Reese Witherspoon, 34, was spotted last week cozying up to on-again girlfriend Seyfried after the premiere for her movie Red Riding Hood., as well as at the opening of his The Lincoln Lawyer on Thursday. Knapp appears in two upcoming movies, Project X this Thanksgiving and the Miley Cyrus film So Undercover, also in the fall.