Hoare was born in Bath, Prince Hoare was the son of painter William Hoare and his wife. He was named for the painter's brother, who was a sculptor. Prince studied art from an early age, also becoming a painter. He became well known for his portraits and historical scenes.
Later in his life, Hoare wrote twenty plays. He also wrote Memoirs of Granville Sharp (1820), based on the British abolitionist's manuscripts, family documents and material from the African Institution, London.
^Prince Hoare, Memoirs of Granville Sharp, Esq., Composed from his own Manuscripts and Other Authentic Documents in the Possession of his Family and of the African Institution London, 2 vols. (1820, 2nd edn. 1828)