British-born portrait painter. His famous artistic subjects included John Quincy Adams and the Marquis de Lafayette.
He began painting at the age of twelve and, by eighteen, was a professional portrait artist.
He painted landscapes and historical scenes as well as portraits and is particularly remembered for an 1819 piece entitled Passage of the Delaware.
He and his artist brother, Lawrence Sully, were born in Lincolnshire, England and later settled in the United States. After his brother's death, Thomas Sully married his sister-in-law, Sarah Annis Sully, with whom he raised his nieces and nephews and his own nine children.
He painted several portraits of United States President Thomas Jefferson.