Jamie-Lynn Sigler, who had a baby boy less than a week ago, isn't wasting any time showing him off to the world. Well, part of him, at least.

The 'Sopranos' actress and her fiance, pro baseball player Cutter Dykstra, welcomed little Beau Kyle Dykstra into the world on Aug. 28, and just three days later, she took to Instagram with a shot of herself holding his tiny little hand.

"We hold hands cuz we are besties," she captioned the pic.

It's good to see her so happy, because the last few months have certainly been rough for her. Jamie-Lynn's most recent show, the NBC sitcom 'Guys With Kids,' was yanked off the air in May after just 17 episodes, and the following month, her TV dad, 'Sopranos' stalwart James Gandolfini, passed away from a sudden heart attack.

But all that's behind her now. Here's to new beginnings.