In 1176, William II of Sicily sent ambassadors to the English court to ask for Joan's hand in marriage.
The betrothal was confirmed on 20 May, and Joan's father had to raise money to pay for the cost of the journey and the wedding.
He did this by imposing a tax on English subjects.
On 27 August, Joan set sail for Sicily from Southampton, escorted by John of Oxford, the bishop of Norwich and her uncle, Hamelin de Warenne, Earl of Surrey.
In the Angevin territories of northern France, she was met by her eldest brother Henry the Young King, and he escorted her to Poitou to her brother Richard the Lionheart.
He took her to Saint Gilles, and her entourage was met by representatives of the Kingdom of Sicily: Alfano, Archbishop of Capua, and Richard Palmer, Bishop of Syracuse.

After a hazardous voyage, Joan arrived safely in Palermo, and on 13 February 1177, she married King William and was crowned Queen of Sicily at Palermo Cathedral.

Joan produced no surviving heir.
Although there were rumours that she had given birth to a boy called Bohemond, in 1181 or 1182, he died in infancy if he did exist.
Traditionally, a royal husband in such a situation may have annulled the marriage for a chance to marry a woman who would give him a son.
King William did not annul the marriage, nor did he express any interest in doing so.
Instead, he named his aunt Constance, daughter of Roger II of Sicily as his heir.

When William II died in November 1189, Sicily was seized by his bastard cousin Tancred, who took the lands given to Joan by William with the sound strategic reason that Monte Sant'Angelo lay on the route taken by the invading forces of Heinrich VI of Germany.
In 1176, William II of Sicily sent ambassadors to the English court to ask for Joan's hand in marriage. The betrothal was confirmed on 20 May, and Joan's father had to raise money to pay for the cost of the journey and the wedding. He did this by imposing a tax on English subjects. On 27 August, Joan set sail for Sicily from Southampton, escorted by John of Oxford, the bishop of Norwich and her uncle, Hamelin de Warenne, Earl of Surrey. In the Angevin territories of northern France, she was met by her eldest brother Henry the Young King, and he escorted her to Poitou to her brother Richard the Lionheart. He took her to Saint Gilles, and her entourage was met by representatives of the Kingdom of Sicily: Alfano, Archbishop of Capua, and Richard Palmer, Bishop of Syracuse.
After a hazardous voyage, Joan arrived safely in Palermo, and on 13 February 1177, she married King William and was crowned Queen of Sicily at Palermo Cathedral.
Joan produced no surviving heir. Although there were rumours that she had given birth to a boy called Bohemond, in 1181 or 1182, he died in infancy if he did exist. Traditionally, a royal husband in such a situation may have annulled the marriage for a chance to marry a woman who would give him a son. King William did not annul the marriage, nor did he express any interest in doing so. Instead, he named his aunt Constance, daughter of Roger II of Sicily as his heir.
When William II died in November 1189, Sicily was seized by his bastard cousin Tancred, who took the lands given to Joan by William with the sound strategic reason that Monte Sant'Angelo lay on the route taken by the invading forces of Heinrich VI of Germany.
Joan of England, Queen of Sicily