Meet Ryan Phillippe and Alexis Knapp’s Daughter Kailani!

 2011 Alexis Knapp/WhoSay; Jon Kopaloff/FilmMagic; Noel Vasquez/Getty Images

At long last, meet Kailani Merizalde Phillippe Knapp!

On Monday, So Undercover actress Alexis Knapp, 21, shared an adorable photo of her 3-month-old daughter with ex-boyfriend Ryan Phillippe, 37. "I do declare you to be the prettiest lil girl in the whole wide world," Knapp wrote on her WhoSay page.

Knapp announced her pregnancy at an industry event in mid-February — five months after she and the Lincoln Lawyer star officially ended their on-and-off relationships. (Phillippe was dating Amanda Seyfried at the time; they have since split.)

Though Phillippe has not confirmed his paternity — as of July 25, a source told Us Weekly he had not taken a DNA test — he's found support from his ex-wife Reese Witherspoon, 35, with whom he has two children: Ava, 11, and Deacon, 7.

"Reese feels bad Ryan has to deal with this," an insider told Us at the time. "They're bonding over it because it obviously affects their kids."

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!