On 3 February 1565, Darnley left London and by 12 February, he was in Edinburgh.
On 17 February, he presented himself to Mary at Wemyss Castle in Fife.
James Melville of Halhill reported that "Her Majesty took well with him, and said that he was the lustiest and best proportioned long man that she had seen."
After a brief visit to his father at Dunkeld, Darnley returned with Mary and the court to Holyrood on 24 February.
The next day, he heard John Knox preach, and he danced a galliard with Mary at night.
From then on, he was constantly in Mary's company.

Darnley was his wife's half-first cousin through two different marriages of their grandmother, Margaret Tudor, putting both Mary and Darnley high in the line of succession for the English throne.
Darnley was also a descendant of a daughter of James II of Scotland, and so also in line for the throne of Scotland.

As a preliminary to the marriage, Darnley was made Lord of Ardmanoch and Earl of Ross at Stirling Castle on 15 May 1565.
An entourage of 15 men were made knights, including one of Mary's half brothers, Robert Stewart of Strathdon, Robert Drummond of Carnock, James Stewart of Doune Castle, and William Murray of Tullibardine.
In England, a concerned Privy council debated the perils of the intended marriage on 4 June 1565.
One of their resolutions was to relax the displeasure shown to Lady Catherine Grey, another rival to Mary Stuart for the English throne.
Mary sent John Hay, Commendator of Balmerino, to speak to Elizabeth; Elizabeth demanded Darnley's return, and gave John Hay plainly to understand her small satisfaction.

On 22 July, Darnley was made Duke of Albany in Holyrood Abbey, and the banns of marriage were called in the parish of Canongate.
A proclamation was made at the Cross of Edinburgh on 28 July that government would be in the joint names of the king and queen of Scots, thus giving Darnley equality with, and precedence over, Mary.
This was confirmed in the circulation of a silver ryal in the names of Henry and Mary.

On 29 July 1565, the marriage took place by Roman Catholic rites in Mary's private chapel at Holyrood, but Darnley (whose religious beliefs were unfixed – he was raised as a Catholic, but was later influenced by Protestantism) refused to accompany Mary to the nuptial Mass after the wedding itself.
On 3 February 1565, Darnley left London and by 12 February, he was in Edinburgh. On 17 February, he presented himself to Mary at Wemyss Castle in Fife. James Melville of Halhill reported that "Her Majesty took well with him, and said that he was the lustiest and best proportioned long man that she had seen." After a brief visit to his father at Dunkeld, Darnley returned with Mary and the court to Holyrood on 24 February. The next day, he heard John Knox preach, and he danced a galliard with Mary at night. From then on, he was constantly in Mary's company.
Darnley was his wife's half-first cousin through two different marriages of their grandmother, Margaret Tudor, putting both Mary and Darnley high in the line of succession for the English throne. Darnley was also a descendant of a daughter of James II of Scotland, and so also in line for the throne of Scotland.
As a preliminary to the marriage, Darnley was made Lord of Ardmanoch and Earl of Ross at Stirling Castle on 15 May 1565. An entourage of 15 men were made knights, including one of Mary's half brothers, Robert Stewart of Strathdon, Robert Drummond of Carnock, James Stewart of Doune Castle, and William Murray of Tullibardine. In England, a concerned Privy council debated the perils of the intended marriage on 4 June 1565. One of their resolutions was to relax the displeasure shown to Lady Catherine Grey, another rival to Mary Stuart for the English throne. Mary sent John Hay, Commendator of Balmerino, to speak to Elizabeth; Elizabeth demanded Darnley's return, and gave John Hay plainly to understand her small satisfaction.
On 22 July, Darnley was made Duke of Albany in Holyrood Abbey, and the banns of marriage were called in the parish of Canongate. A proclamation was made at the Cross of Edinburgh on 28 July that government would be in the joint names of the king and queen of Scots, thus giving Darnley equality with, and precedence over, Mary. This was confirmed in the circulation of a silver ryal in the names of Henry and Mary.
On 29 July 1565, the marriage took place by Roman Catholic rites in Mary's private chapel at Holyrood, but Darnley (whose religious beliefs were unfixed – he was raised as a Catholic, but was later influenced by Protestantism) refused to accompany Mary to the nuptial Mass after the wedding itself.
Henry Stuart, Lord Darnley