Mike Diamond, aka Mike D, grew up a precocious and highly opinionated young man on the island of Manhattan. He spent his childhood thieving 7" records by the Jackson Five, The Beatles and various Motown artists from his older brothers while living in the very liberal upper West Side - with the background of New York City's fiscal crisis and all the turmoil and lawlessness that went with that. After finally saving up his own money to purchase Steve Miller's "Fly Like An Eagle" album, Diamond started to learn to play the drums.

Soon after he discovered punk rock and it was game over. That was until he heard a rap mix tape and then it was game over again. Once discovering Reggae through the influence of punk bands like The Clash and The Slits - it was game over a third time.

He went on to form Beastie Boys with Adam Yauch, aka MCA, in the early 80's. While inspired by hardcore punk, the boys listened all the while to every new rap 12 inch that came out and eventually rapping themselves. They soon began merging their many influences in what would go on to become a multi-record, multi-platinum and multi-decade career.

The band went on to win a bunch awards, such as Grammys, the highly acclaimed Blackshere Award, a very spirited Brass Monkey Award and the key to Kansas City, Missouri… though this is still shrouded in a bit of mystery. In 2012 Beastie Boys were inducted into the Rock N Roll Hall of Fame.

Mike D, MCA and Adrock oversaw all aspects of their artistic output from music production to co-authoring videos with esteemed directors like Spike Jonze and Nathaniel Hörnblowér, to spending countless hours on their live visuals.

In the early 90s, Beastie Boys founded their own Grand Royal record label and magazine, creating multiple outlets to turn their visual, musical and literary ideas and inspirations on full display.

Diamond continued to apply this aesthetic (non) sense to home design, online content and even curating a multi-week group showcase at LA MOCA called "Transmission LA- AV Club". The show was centered around the relationship of visual art and music, staged with Jeffrey Deitch. To bring this point home, the show included a full music program as well as food by pioneering chef, Roy Choi.

In 2018, along with his bandmate, Adam Horovitz, Diamond co-authored Beastie Boys Book, which told the story of the band in its own words and reached #1 on The New York Times Best Seller list. A limited series of live shows, in which the two brought stories from the book to life, was captured in the 2020 film Beastie Boys Story, directed by longtime collaborator and friend of the band Spike Jonze.