Later that day, the family headed out to dinner, where little Luca added something extra to his famous mother's plate.
"This is what my plates look like now. #thanksluc," Duff wrote on Twitter, along with a photo of her meal with her son's airplane toy.
Age is just a number for Kylie Jenner.
We all know Taylor Swift likes to dance. But, did you know she could break it down like THIS?