Kate Middleton and Prince William are shielding Princess Charlotte from the potential pitfalls of being the "spare" to her brother Prince George, heir to the throne.

The royal couple is said to be treading carefully with Charlotte’s upbringing in light of the Duke of Sussex’s candid account of life as a “spare."

Royal biographer Robert Hardman weighed in on how the Prince and Princess of Wales are handling Princess Charlotte’s reality of being third in line to the throne.