"Gossip Girl" star Kelly Rutherford welcomed baby girl Helena Grace in L.A. yesterday -- and the baby's dad claims to have found out on the Internet!

Rutherford's ex-husband, Daniel Giersch, released a statement to People magazine. "I was never informed by Kelly about the birth of our daughter, nor was I invited to attend. In fact, I found out about it through Internet reports like everyone else."

Kelly's rep tells "Extra" that Daniel's claims of not being notified are not true. "Daniel was notified when [Helena] was born and was immediately invited to come see her."

And that's all the gossip on that, baby.