Alexis Knapp Gives Birth With Rumored Father Ryan Phillippe By Her Side

Alexis Knapp, 21, gave birth on July 1, and the baby's alleged daddy, Ryan Phillippe, 36, was by her side during the delivery at Cedars-Sinai Medical Center,

According to In Touch, Knapp gave birth to a baby girl named Kai, who weighed in at 8 lbs. A friend of the model/actress tells the mag:

"It was a smooth delivery if a little late. Ryan took Alexis to her last doctor's appointments and was there in the hospital when she gave birth. He's waiting for the DNA test to see of he's the father, but he's acting like he is."

If it turns out that Mr. Phillippe is Kai's dad, then Ava and Deacon (his children with Reese Witherspoon) have a baby half-sister. Congrats!

Read more about Alexis' delivery ... after the jump.