Back in March, Us was first to report that Knapp, 21, was expecting -- and had announced to pals that actor Phillippe (they dated last year before parting ways in September 2010) was the father. Another source adds that the Lincoln Lawyer actor, 36, "has known since the beginning that he's the dad. He is not taking a paternity test."
Explains the source of Phillippe's presence during the birth: "He is a good father, and whether this is his baby or not, he wants to do the right thing and be supportive." Phillippe (dad to Deacon, 7, and Ava, 11 with ex-wife Reese Witherspoon) was photographed for the first time with Knapp in late June, escorting the mom-to-be to a doctor's appointment.
As for So Undercover actress Knapp, "she has never asked Ryan for any help, nor does she expect it," her rep told Us.