Actor Ryan Phillippe has found himself caught up in a baby riddle after it was revealed that his ex-girlfriend, actress Alexis Knapp, is seven months pregnant. And she says it’s his baby.

The pair apparently dated five months ago and according to reports by US Weekly magazine, Alexis is allegedly telling people that Ryan is the dad to her unborn child and Ryan has reportedly said he’d happily take a DNA test.

“Ryan doesn’t know if he’s the dad. If he is, he will take full responsibility for the child,” a source told the American magazine.

Ryan is already dad to daughter Ava, 11, and son Deacon, 7, from his relationship with actress Reese Witherspoon.