The Portrait of Olivia Porter is an oil painting on canvas by Anthony van Dyck, showing Olivia, Lady Porter, the wife of Sir Endymion Porter, daughter of John Boteler, 1st Baron Boteler of Bramfield, and niece of the Duke of Buckingham, a zealous Roman Catholic and a lady in waiting to Henrietta Maria of France, queen consort to Charles I of England.

[2] In March 2013, the BBC announced that a previously unknown painting by van Dyck had been found in public ownership through the website.

[3] Filmed for the BBC Two programme Culture Show, art historian Bendor Grosvenor investigated the painting after originally spotting it online.

[3] Christopher Brown, director of the Ashmolean Museum, confirmed it was a van Dyck after it had been restored.

[3] It was identified as being of Olivia Porter, who was a lady in waiting to Henrietta Maria, the queen consort of Charles I of England.