In 1743, his paternal grandmother, Françoise-Marie de Bourbon the formidable Dowager Duchess of Orléans, and Louise Élisabeth, Dowager Princess of Conti arranged his marriage to his seventeen-year-old cousin, Louise Henriette de Bourbon (1726–1759), a member of the House of Bourbon-Conti, another cadet branch of the House of Bourbon.
It was hoped this marriage would close a fifty-year-old family rift.

Louis Philippe's father, Louis le Pieux, gave his consent to the union in the belief that because the young bride had been brought up in a convent, she would be a paragon of virtue and as such be an ideal wife for his son.
Louise Henriette was the only daughter of Louis Armand de Bourbon, Prince of Conti and the earlier mentioned Louise Élisabeth de Bourbon.
Louise Henriette was a Princess of the Blood (princesse du sang) and was known at court as Mademoiselle de Conti.

The couple was married on 17 December 1743 in the chapel of the Palace of Versailles.

After a few months of a passion that surprised everyone at court, the couple started to drift apart as the young Duchess of Chartres began to lead a scandalous life.
This caused her father-in-law to refuse to recognise the legitimacy of his grandchildren.

The couple had three children:
A daughter (Château de Saint-Cloud, 12 or 13 July 1745 – 14 December 1745, Château de Saint-Cloud);
Louis Philippe Joseph d'Orléans (Château de Saint-Cloud, 13 April 1747, – 6 November 1793, Place de la Révolution, Paris (executed)), who succeeded his father as Duke of Orléans in 1785,
Duke of Montpensier at birth,
Duke of Chartres at the death of his grandfather in 1752,
Duke of Orléans at the death of his father in 1785,
known as Philippe-Égalité during the French Revolution;
possible husband for Princess Maria Kunigunde of Saxony (1740–1826), youngest daughter of Augustus III of Poland;
married Louise Marie Adélaïde de Bourbon, Mademoiselle de Penthièvre, and was the father of Louis-Philippe King of the French;
Louise Marie Thérèse Bathilde d'Orléans (Château de Saint-Cloud, 9 July 1750 – 10 January 1822, Paris), the last princesse de Condé,
possible bride for Ferdinand, Duke of Parma,
married Louis Henry II, Prince of Condé,
known as Mademoiselle at court prior to her marriage,
known as Citoyenne Vérité during the French Revolution.

Because he knew that Louise Henriette was having affairs during her marriage and felt that Louis Philippe was physically incapable of having children, Louise Henriette's father-in-law refused to acknowledge any of her children as legitimate.
In 1743, his paternal grandmother, Françoise-Marie de Bourbon the formidable Dowager Duchess of Orléans, and Louise Élisabeth, Dowager Princess of Conti arranged his marriage to his seventeen-year-old cousin, Louise Henriette de Bourbon (1726–1759), a member of the House of Bourbon-Conti, another cadet branch of the House of Bourbon. It was hoped this marriage would close a fifty-year-old family rift.
Louis Philippe's father, Louis le Pieux, gave his consent to the union in the belief that because the young bride had been brought up in a convent, she would be a paragon of virtue and as such be an ideal wife for his son. Louise Henriette was the only daughter of Louis Armand de Bourbon, Prince of Conti and the earlier mentioned Louise Élisabeth de Bourbon. Louise Henriette was a Princess of the Blood (princesse du sang) and was known at court as Mademoiselle de Conti.
The couple was married on 17 December 1743 in the chapel of the Palace of Versailles.
After a few months of a passion that surprised everyone at court, the couple started to drift apart as the young Duchess of Chartres began to lead a scandalous life. This caused her father-in-law to refuse to recognise the legitimacy of his grandchildren.
The couple had three children:
A daughter (Château de Saint-Cloud, 12 or 13 July 1745 – 14 December 1745, Château de Saint-Cloud);
Louis Philippe Joseph d'Orléans (Château de Saint-Cloud, 13 April 1747, – 6 November 1793, Place de la Révolution, Paris (executed)), who succeeded his father as Duke of Orléans in 1785,
Duke of Montpensier at birth,
Duke of Chartres at the death of his grandfather in 1752,
Duke of Orléans at the death of his father in 1785,
known as Philippe-Égalité during the French Revolution;
possible husband for Princess Maria Kunigunde of Saxony (1740–1826), youngest daughter of Augustus III of Poland;
married Louise Marie Adélaïde de Bourbon, Mademoiselle de Penthièvre, and was the father of Louis-Philippe King of the French;
Louise Marie Thérèse Bathilde d'Orléans (Château de Saint-Cloud, 9 July 1750 – 10 January 1822, Paris), the last princesse de Condé,
possible bride for Ferdinand, Duke of Parma,
married Louis Henry II, Prince of Condé,
known as Mademoiselle at court prior to her marriage,
known as Citoyenne Vérité during the French Revolution.
Because he knew that Louise Henriette was having affairs during her marriage and felt that Louis Philippe was physically incapable of having children, Louise Henriette's father-in-law refused to acknowledge any of her children as legitimate.
Louis Philippe I, Duke of Orléans