After marrying Prince William on April 29, 2011, Kate Middleton appeared to develop a strong relationship with her husband's grandmother, Queen Elizabeth II. However, several royal experts have suggested that the late Queen shared some concerns about Princess Kate with friends, and allegedly went so far as to say she had a " Kate problem ."

Kate Middleton is wishing her other half a happy birthday. In honor of Prince William turning 43 on June 21, the Princess of Wales, 43, shared a sweet snapshot on social media. Middleton posted a picture of the Prince of Wales to Instagram, showing her husband sitting in the grass holding one puppy, while the others surround him.

Prince William rang in 43 on Saturday with the help of Kate Middleton’s traditional birthday portrait — and the royal couple’s new puppies.