Princess Charlotte bosses her big brother Prince George, Queen Elizabeth reveals

Charlotte is two years younger than her brother, Prince George.

Queen Elizabeth, 91, made the remarks Sunday as she was presenting a bible to a 10-year-old girl, Emily Clay, and her mother at Sandringham, the queen's estate in Norfolk.

Queen Elizabeth asked Emily if she “looked after” her younger sister.

When Emily's mom said, “It’s the other way around," Queen Elizabeth replied, "It's like that with Charlotte and George."

Charlotte, who will turn 3 in May, also recently started preschool at Willcocks Nursery School, near Kensington Palace in London.

Charlotte showed her confidence, beaming with pride and donning a pink backpack and red coat, in photographs taken by Kate on her first day of school.

George started school at St. Thomas's Battersea School in September. Prior to that, George attended Westacre, a local Montessori school near the family's country home, Anmer Hall, in Norfolk.

The two siblings will soon have a new addition to their relationship. William and Kate are expecting their third child in April.