His most iconic portraits include Barack Obama...
.... and a naked Marilyn Monroe, made primarily of peach-coloured crayons.
An artist creates sculptures using up to 250,000 colouring crayons.
Herb Williams, 36, uses so many crayons he has a personal account with manufacturer Crayola and has the company on speed dial .
His works include animals, household items, and celebrities, such as this sculpture of Johnny Cash, the Man in Black .
The smaller works sell for around £650, while the larger pieces have a price tag of £40,000 .
He lists artists such as Damien Hirst, Banksy and Duchamp among his influences and describes his work as "post-post-post-pop"
The married father-of-two from Tennessee, United States, said: "I'm one of the only individuals in the world with an account with Crayola and have more cases of crayons in my studio than anyone should have a right to own".
The crayons are delivered in single-colour boxes of 3,000 sticks and fill his studio from floor to ceiling .
His work can be bought online at HEREVisit 13above For More Fun
