all dressed in prince and princess costumes alongside their granddaughter, Rani Rose. "Happy 4th birthday our precious Rani Rose You are the real queen!" Hawn wrote. "I'll take Lady in waiting ...

14. Wishing my sweetest granddaughter a very happy birthday! May your life be as bright and beautiful as your smile. 15.

The King and Queen shared sweet well-wishes for Charles's granddaughter ... leggings and a backpack. "Happy Birthday to Princess Charlotte! [cake and celebration emojis]," the caption read ...