British portrait painter Thomas Gainsborough on Wikipedia.
See more Gainsborough paintings after the cut.
Edit: Updated this post with new and better quality pictures.
Mrs. Moody and two of her children, c.1774-76.
Portrait of a Lady now thought to be Mrs William Hallett, 1788.
Mrs Richard Sheridan, 1785.
Grace Dalrymple Elliott.
Mrs Thomas Hibbert.
The Honorable Mrs Graham.
Georgiana, Duchess of Devonshire.
Giovanna Baccelli, 1782.
Mary, Lady Bate-Dudley, 1787.
The three eldest daughters of George III, Princesses Charlotte, Augusta and Elizabeth, 1784.
This seems to be a sketch of the above painting. It’s less detailed.
Sophia Charlotte, Lady Sheffield, 1785-1786.
Miss Catherine Tatton, 1785.