Michael Acton Smith OBE (born 3 September 1974[1]) is the co-CEO and co-founder of Calm, a meditation space company.

[8] The company launched alternate reality game Perplex City, a global treasure hunt with £100,000 buried somewhere in the world that played out across various media including websites, text messages, magazines, live events, skywriting and multiple helicopters.

[18] By 2015, Calm had reached 2 million downloads worldwide and, after winning a British competition, launched the world's first "slow TV Ad".

[22] Acton Smith is also the founder of Ping Pong Fight Club,[23] Silicon Drinkabout,[24] and the Berwickstock Festival.

[25] He was awarded a BAFTA in 2013 for Moshi Monsters[26] and was appointed Officer of the Order of the British Empire (OBE) in the 2014 New Year Honours for services to the creative industries.