Rod Stewart and Penny LancasterNo 'Maggie May' for Rod Stewart -- the singer and his wife, Penny Lancaster Stewart, welcomed a son, Aiden, yesterday.

According to PEOPLE, the healthy baby weighs 7 lbs., 12 oz. and is the second son for the couple. Aiden will be the perfect live-in playmate for older brother Alastair, who is 5 years old.

"We were thrilled and delighted to be able to tell Alastair that he was going to be a big brother," a pregnant Penny told PEOPLE in August.

Although Stewart, 66, has six other children from previous relationships, we suspect he'll be as busy as ever with his new baby boy.

And it looks like Penny, who will turn 40 in March, will need to add one more to her birthday party guest list.