In a highly anticipated ceremony, presided over by the Archbishop of Uppsala Anders Wejryd, the birth of Princess Estelle Silvia Ewa Mary, will be formally celebrated on May 22.
Details of the event were announced as the palace also published new pictures of the little girl with her parents, Crown Princess Victoria and her husband Daniel.
"We're so excited," said Victoria's sister Madeleine.
"She really is a little miracle, just like all babies. It's wonderful being an aunt, and I'm so proud for Victoria and Daniel."