The actress has one son with her husband of six years, Adam Shulman.
Both Prince William and Kate are often spotted getting down to eye level with their own offspring, as well as any children they meet on their royal visits.
Ms Hathaway has also announced that she has given up alcohol so she can be the best mother she possibly can be.
She said she would stop drinking until her son moves out of home.
Ms Hathaway also said: “I’m not perfect, but if I’m frustrated or distracted, I’m good at making sure he’s safe and walking away, calming down and then coming back to him.