Meghan Markle and Princess Kate were both brought to tears over an argument about bridesmaids' dresses, a new biography states.

The duchess shared a never-before-seen photo of a newborn Lili—and a video that shows her and Harry busting a move in the delivery room—in honor of the princess’s big day.

Meghan marked her daughter's fourth birthday by sharing several photos on Instagram, including a current photo showing a rare glimpse of Lili's face and a throwback photo from Lili's birth. "Happy birthday to our beautiful girl!