Mark Constantine OBE (born 1952) is a British entrepreneur and trichologist best known as the co-founder and CEO of Lush, described as "one of the world's biggest cosmetics firms.

He failed his GCEs at Weymouth Grammar School and became homeless at the age of 16, sleeping in a tent in an area of woodland.

[3] During his freelance career, Constantine sent samples of his work, such as shampoo, to Dame Anita Roddick, founder of The Body Shop from whom he took some orders.

However, due to intellectual property rights which Roddick believed she owned, Constantine sold the company to her in 1991 for a sum of £17 million.

[1] Constantine and Mo were both appointed Officer of the Order of the British Empire (OBE) in the 2011 New Year Honours, having been recognised for their "services to the beauty industry.