Whoa! Talk about some major baby momma drama!
Okay, maybe it's not that dramatic, but still, it's pretty big news!
The couple dated for several months on and off last year before he ended things in September.
A source says that "she's in the second trimester" and "she has been telling people he is the father."
"Ryan doesn't know if he is the dad," adds the source, but "if he is, he will take full responsibility for the child. He loves being a dad and takes being a dad really seriously."
We wonder what Amanda Seyfried has to say about this. She isn't exactly having the best week. First, her movie bombs at the box office and now her boyfriend's former flame may be preggers with his baby.
Awww, poor girl!
Don't worry, Amanda. Ryan's a good daddy and will own up to his responsibilities. Just hang in there, kid.
Oh, and congrats to Ryan and Alexis!