Frederick Francis IV (Friedrich Franz Michael; 9 April 1882 – 17 November 1945) was the last Grand Duke of Mecklenburg-Schwerin and regent of Mecklenburg-Strelitz. He inherited the throne when he was fifteen years old in 1897 and was forced to renounce it in 1918.

Born on 9 April 1882, Duke Frederick Francis IV was the son of Frederick Francis III, Grand Duke of Mecklenburg-Schwerin, then hereditary Grand duke, and Grand Duchess Anastasia Mikhailovna of Russia.^[1] He was born in Palermo, Sicily at Villa Belmonte where his parents were staying to alleviate the faltering health of the hereditary Grand duke.^[1] Frederick Francis's father suffered from a weak heart, chronic asthma, and acute eczema and had to live part of the year away from Mecklenburg in a warmer climate. Frederick Francis's mother, raised in the splendor of the Russian imperial court and the Orthodox church, never got used to the provincial austerity of the Lutheran court of Schwerin, preferring to live abroad.^[1]

Frederick Francis was one year old when he became the hereditary grand duke of Mecklenburg-Schwerin at the death of his grandfather Frederick Francis II, Grand Duke of Mecklenburg-Schwerin on 15 April 1883. Frederick Francis IV had an older sister, Alexandrine and a younger one, Cecilie.^[1] The three children were raised with simplicity and a lot of freedom by royal standards. Theirs was a polyglot household. The three siblings, who would remain very close throughout their lives, learned English, French, German and Russian. The family spent only half of the year in Schwerin during the summer months. They stayed as little time as possible in Schwerin Castle surrounded by a lake, preferring Gelbensande, a hunting lodge near Rostock and the Baltic Sea.^[2] There, the family led the simple life they preferred.^[2] Friederich Franz III spent most his time hunting, while Anastasia and the children rode or drove out, visited local people or enjoyed the beach and the surrounding forest. Every year from November until May, they lived in Villa Welden in Cannes where they sailed with their father and swam in the Mediterranean.^[3] On their journey back to Germany they stopped in Paris.

Frederick Francis IV succeeded his father as Grand Duke upon his death on 10 April 1897. He had just turned fifteen the day before. As he was a teenager, due to his minority, the grand duchy was governed by his uncle Duke Johann Albrecht as regent. Frederick Francis's mother, Grand Duchess Anastasia preferred to remain in France while he continued the long preparation to eventually assume the throne. The following year, his older sister, Alexandrine married the Danish Crown Prince (future King Christian X in 1912). His mother and younger sister Cecile visited him frequently in Dresden and during their stays, they would go out for long drives in a carriage and horses bought for him from Schwerin. In 1903, the young Grand Duke moved to Bonn, where he attended university and studied administration and law. Adolf Langfeld was appointed as his study advisor.

On 9 April 1901 Frederick Francis came of age, ending the regency and beginning his reign in Schwerin. He immediately began working on a reform of the constitution, but it failed in the face of opposition from parliament.

German decorations^[5]

Foreign decorations^[5]