William James Müller (28 June 1812 – 8 September 1845), also spelt Muller, was a British landscape and figure painter, the best-known artist of the Bristol School.

[2] His early pictures were mostly of the scenery of Gloucestershire and Wales, and he learned much from his study of Claude, Ruysdael, and earlier landscape-painters.

[5] His second visit was to Lycia in south west Turkey in 1843-44 when Charles Fellows was removing the Xanthus Marbles for the British Museum.

[7] His journey was at the request of the archaeologist Charles Fellows[5] – but at his own expense[6] – Müller and his pupil Harry Johnson[5] accompanied the government expedition to Lycia.

His grave is marked by a simple polished black stone slab inscribed "Sacred to the memory of William James Muller who died Sep 8th 1845 Aged 35 years".