They split up in October after dating for four months.
But rumours are surfacing that aspiring actress Alexis Knapp is pregnant with Ryan Phillippe 's baby.
A source close to the 26-year-old mother-to-be is quoted as saying to Us magazine: "She has been telling people he is the father."
A second source said: "Ryan doesn't know if he is the dad. If he is, he will take full responsibility for the child."
Alexis is seven months pregnant with the baby. Ryan - father of ten-year-old Ava and Deacon, six, from his previous marriage to Reese Witherspoon - is now rumoured to be romancing actress Amanda Seyfried.
Photo: © Getty