Lisa Marie Presley gave birth to twin girls at Los Robles Hospital in Thousand Oakes, California on Friday, according to Star Magazine. Elvis' 40-year-old daughter is now a mother to four children.

Presley's other two children, Riley and Ben, were there for the birth of their new baby sisters, and her husband, Michael Lockwood, was by her side the entire side.

A source told Star Magazine:

“Lisa Marie is mom to four now! She’s feeling good, a little tired too. She is so happy and Michael is ecstatic. He’s wanted to be a dad for so long. This is his dream come true. There was no drama. The babies are healthy and beautiful. Ben was seen pushing them down the hall in their cart and cooing to them."

The names of the girls haven't yet been revealed, which begs the question - will she go with something traditional, or pick some out-there Hollywood-type names? And, will she sell photos of the babies to a gossip mag?