Allan Ramsay was a prominent Scottish portrait-painter.
Allan Ramsay was born in Edinburgh, Scotland, the eldest son of Allan Ramsay, poet and author of The Gentle Shepherd. From the age of twenty he studied in London under the Swedish painter Hans Hysing, and at the St. Martin's Lane Academy; leaving in 1736 for Rome and Naples, where he worked for three years under Francesco Solimena and Imperiali (Francesco Fernandi).

On his return in 1738 to the British Isles, he first settled in Edinburgh, attracting attention by his head of Duncan Forbes of Culloden and his full-length portrait of the Duke of Argyll, later used on Royal Bank of Scotland banknotes. He later moved to London, where he was employed by the Duke of Bridgewater.

His pleasant manners and varied culture, not less than his artistic skill, contributed to render him popular. His only serious competitor was Thomas Hudson, with whom he shared a drapery painter, Joseph van Aken.

He gave up painting in about 1770 to concentrate on literary pursuits. His health was shattered by an accidental dislocation of the right arm and his second wife's death in 1782. With unflinching pertinacity, he struggled until he had completed a likeness of the king upon which he was engaged at the time, and then started for his beloved Italy. He left a series of 50 royal portraits to be completed by his assistant Reinagle. For several years he lingered in the south, his constitution finally broken. He died at Dover on 10 August 1784.