How were Louis XVI of France and Marie Antoinette related?

Marie Antoinette was the second cousin once removed of Louis XVI of France.

Their nearest shared ancestors were Leopold I, Holy Roman Emperor and Eleonor Magdalene of Neuburg.

That is only the shortest of 7 separate lines of descent between them.

The line between them

1. Louis XVI of France 1754–1793
2. Marie Josèphe of Saxony 1731–1767
3. Maria Josepha of Austria 1699–1757
4. Joseph I, Holy Roman Emperor 1678–1711
5. Leopold I, Holy Roman Emperor 1640–1705
6. Charles VI, Holy Roman Emperor 1685–1740
7. Maria Theresa of Austria 1717–1780
8. Marie Antoinette 1755–1793

See the line on the tree