It's a Boy — and a Girl — for J.Lo!

Congratulations to Jennifer Lopez and Marc Anthony, who welcomed a pair of twins — one boy and one girl — into the world last night in Long Island, N.Y.

While the names have not yet been announced, a rep for the singer is telling reporters that the girl, who was born first at 12:12 a.m., weighed in at 5 lbs, 7 oz, while their new son followed 11 minutes later and weighed an even 6 lbs.

This is J.Lo's first go at motherhood, though she has surely learned a lot from playing stepmom to Marc's three children.

In October — before Jennifer and Marc had even confirmed the pregnancy rumors — OK! was that the singer and her husband were not only expecting, but that they had twins on the way.

The pair did their best to keep the pregnancy out of the public eye in its early stages, but finally announced the news to the world at a Nov. 8 concert in Miami, where Marc lovingly rubbed and pointed to his wife's now-obvious baby bump.