Juliana Louise Emma Marie Wilhelmina, Prinses der Nederlanden, Prinses van Oranje-Nassau, hertogin van Mecklenburg, prinses van Lippe-Biesterfeld (Paleis Noordeinde, Den Haag, 30 april 1909 – Paleis Soestdijk, Baarn, 20 maart 2004) was koningin der Nederlanden van 4 september 1948 tot en met 30 april 1980. Juliana was getrouwd met prins Bernhard van Lippe-Biesterfeld (1911–2004), with whom she had four daughters, and was the only child from the marriage of Queen Wilhelmina of the Netherlands (1880–1962) with Prince Hendrik van Mecklenburg-Schwerin (1876–1934). Juliana was Princess Regents, when her mother temporarily resigned the royal authority, from 14 October 1947 to 1 December 1947 and from 14 May 1948 to 30 August 1948.