Princess Eugenie has shared an adorable post on Instagram following the birth of her new niece, Athena. Princess Beatrice gave birth to her and Edoardo Mapelli Mozzi's second daughter on January 22. Athena weighed 4lbs 5pz at the time of her birth.

Princess Eugenie has taken to Instagram to welcome her new-born niece, Athena Elizabeth Rose Mapelli Mozzi. It comes after Edoardo shared a sweet photo of the young royal on his Instagram account, announcing the new royal baby girl.

On Jan. 29, Buckingham Palace Buckingham Palace announced the arrival of Princess Beatrice, 36, and husband Edoardo Mapelli Mozzi ’s second child, sharing a heartwarming first photo of the newborn. The couple chose the name Athena Elizabeth Rose — a touching tribute to Beatrice’s late grandmother, Queen Elizabeth .