Noble. The great-grandson of James, the 5th Earl of Wemyss, Charteris married in Edinburgh in 1794. In 1810, he succeeded his cousin as the 4th Earl of March, Viscount of Peebles, and Lord Douglas of Neidpath, Lyne and Munard. In celebration, he changed his surname to Charteris-Wemyss-Douglas. Charteris was created Lord Wemyss of Wemyss in his own right in 1821. However, in 1826, he secured a reversal of the attainder, which had lost the Wemyss Earldom following the support of his great uncle, David, Lord Elcho (1721-87), for the Jacobite cause, and he was able to succeed as the 6th Earl of Wemyss.
He died at Gosford House (East Lothian).