“The new baby’s grandparents and great-grandparents have all been informed and are delighted with the news. The family would like to thank all the staff at the hospital for their wonderful care,” Buckingham Palace said in a statement.
The palace added that mother and baby “are both doing well,” with the delighted parents “looking forward to introducing their daughter to her big brother Christopher Woolf.”
Beatrice is already stepmother to Mapelli Mozzi’s young son, affectionately known as Wolfie, from a previous relationship.
“Thank you to the Midwife team and everyone at the hospital for their wonderful care,” she added.
The baby, who will be 11th in line to the throne, is the Queen’s 12th great-grandchild and the fourth royal baby born this year. Beatrice’s younger sister, Eugenie, gave birth to a baby boy, August Philip Hawke Brooksbank, in February.