Born Louise Marie Amélie, she married Prince Philipp of Saxe-Coburg and Gotha her second cousin, in Brussels, on 4 February/4 May 1875.
Philipp was thirty-one at the time of the marriage; his new bride was seventeen.
The couple had two children:
Leopold Clement Philipp August Maria (Svätý Anton, 19 July 1878 - Vienna, 27 April 1916)
Dorothea Maria Henriette Auguste Louise (Vienna, 30 April 1881 - Dischingen, 21 January 1967), married on 2 August 1898 to Ernst Günther, duke of Schleswig-Holstein-Sonderburg-Augustenburg
The marriage was disliked by her father, who regarded it as an unwelcome alliance with Prussia, but her mother approved of it because Philipp lived in Hungary.

The relationship between Louise and Philip was not happy.
Louise later wrote that she had fled the bedchamber as soon as possible the morning after her wedding, due to her extreme distress.
Philipp is said to have been controlling, and Louise responded by living a lavish lifestyle at the court of Vienna, where she attracted much attention.

In 1880, she suggested the marriage between her sister Stephanie and Crown Prince Rudolf of Austria.
Born Louise Marie Amélie, she married Prince Philipp of Saxe-Coburg and Gotha her second cousin, in Brussels, on 4 February/4 May 1875. Philipp was thirty-one at the time of the marriage; his new bride was seventeen. The couple had two children:
Leopold Clement Philipp August Maria (Svätý Anton, 19 July 1878 - Vienna, 27 April 1916)
Dorothea Maria Henriette Auguste Louise (Vienna, 30 April 1881 - Dischingen, 21 January 1967), married on 2 August 1898 to Ernst Günther, duke of Schleswig-Holstein-Sonderburg-Augustenburg
The marriage was disliked by her father, who regarded it as an unwelcome alliance with Prussia, but her mother approved of it because Philipp lived in Hungary. 
The relationship between Louise and Philip was not happy. Louise later wrote that she had fled the bedchamber as soon as possible the morning after her wedding, due to her extreme distress. Philipp is said to have been controlling, and Louise responded by living a lavish lifestyle at the court of Vienna, where she attracted much attention. 
In 1880, she suggested the marriage between her sister Stephanie and Crown Prince Rudolf of Austria.
Princess Louise of Belgium