Simon Cowell's Valentine's Day present was a 6 pound, 7 ounce bundle of joy. The reality TV mogul and lovable sourpuss and his gorgeous girlfriend, Lauren Silverman, welcomed their baby boy at 5:45PM ET on Feb. 14.

Fatherhood is a new role for the famously cantankerous reality singing show judge!

The little guy was born at Lenox Hill Hospital in NYC this evening, even though Silverman had gone into labor early in the morning, according to E!

Cowell reportedly had a private jet on standby for a week so that he could head to NYC on a moment's notice to be with Silverman. He skipped the London auditions of 'Britain's Got Talent' so that he could meet his son as he made his entrance. Clearly, Si Co is taking fatherhood seriously.

This is the first child for Cowell, 55. Silverman, 36, is mother to son Adam, 8. Her parents were in the delivery room when she went into labor and her sister was also present.

Her son was not, as he was on a pre-planned vacation with his father and Silverman's ex Andrew, a former friend of Cowell. Lauren was still married to Andrew when news of her pregnancy broke back in July.

We can't wait to see a pic of the little angel and to find out his name, which Cowell revealed had been chosen back in the fall.

So while his "other" baby, the U.S. version of 'X Factor,' has been canceled, Si Co has a new baby to nurture and help grow! Let's hope the One Direction boys send over some 1D-branded onesies for Simon's lil man.