Queen Louise wanted her eldest son to marry as well as had her two daughters, Alexandra and Dagmar.
Queen Victoria of the United Kingdom had two yet unmarried daughters,
Princess Helena and
Princess Louise, and Queen Louise planned to have Frederick marry one of them. During his stay in England, Crown Prince Frederik actually took an interest in Princess Helena, and although his feelings were reciprocated, the connection did not materialize, as Queen Victoria opposed it. Victoria did not want her daughters to marry heirs to foreign thrones, as this would force them to live abroad, instead preferring German princes who could establish homes in England. In addition, Victoria had always been pro-German and another Danish alliance (Frederick's sister, Alexandra, had married Victoria's eldest son
Albert Edward, Prince of Wales), would not have been in line with her German interests. After this failed marriage attempt, attention turned instead to
Princess Louise of Sweden, the only daughter of King
Charles XV of Sweden. Princess Louise belonged to the
Bernadotte dynasty, which had ruled in Sweden since 1818, when the founder,
Jean-Baptiste Bernadotte, one of
Napoleon Bonaparte's generals, was elected crown prince of Sweden in 1810 and later succeeded the throne as King Charles XIV John in 1818. He married
Désirée Clary, who had once been engaged to the French Emperor. Charles XIV's son,
Oscar I, had married
Josephine of Leuchtenberg, the granddaughter of Napoleon's first wife, the
Empress Josephine. King Oscar I and Queen Josephine were Princess Louise's paternal grandparents. The marriage was suggested as a way of creating friendship between Denmark and Sweden. Relations between the two countries had been tense after Sweden had not assisted Denmark during the war with Prussia in 1864. Frederick and Louise had met for the first time in 1862, but in 1868, Frederick was invited to Sweden to get to know Louise, and their meeting was described as a success. In July that same year, Crown Prince Frederick—then 25 years old—became engaged to the 17-year-old Princess Louise. A year later, they were married in the chapel at the
Royal Palace in Stockholm on 28 July 1869. Louise was the first Swedish princess to be married into the Danish royal house since the Middle Ages, and the marriage was welcomed in all three Scandinavian countries as a symbol of the new
Scandinavism. On 10 August 1869, the newlyweds made their entrance into
Copenhagen, where they received a warm welcome. As their residence, the couple was awarded
Frederik VIII's Palace, an 18th-century palace which forms part of the
Amalienborg Palace complex in central
Copenhagen. As their country residence they received
Charlottenlund Palace, located on the shores of the
Øresund Strait 10 kilometers north of
Copenhagen. Here they had a refuge far away from court life at Amalienborg and here several of their children were born. Frederick and Louise had four sons and four daughters born between 1870 and 1890:
Prince Christian,
Prince Carl,
Princess Louise,
Prince Harald,
Princess Ingeborg,
Princess Thyra,
Prince Gustav and
Princess Dagmar. Their eldest sons, Christian and Carl, would become kings of Denmark and Norway respectively.{{cite web|url= http://www.kongernessamling.dk/amalienborg/person/christian-10/ |title =Christian 10 |website= Amalienborg ==Heir apparent to the throne==