Happy 4th Birthday, Duke Rancic!
Giuliana Rancic took to Instagram on Monday, Aug. 29 to wish her adorable son a wonderful birthday — and we can't get over how big Duke has gotten!
"My little boy is four! Happy birthday to the light of my life and the greatest gift I ever been given. Every time I see that smile, I'm reminded of what a blessing you are. Mommy and Daddy will love you forever and ever, Duke," the 42-year-old TV star captioned a cute photo of her little boy.
Click through the gallery below to see more celebrity kids then and now!