The Sheffield indie rockers released their third LP Humbug earlier this week, and Diddy, who has a widely-publicised friendship with the band, voiced his support of the record online.
Posting on his Twitter account yesterday while the Arctic Monkeys were on stage in London, the rapper encouraged his 1,819,849 followers to purchase the LP.
"Go get the Arctic Monkeys' new album Humbug!!!!!!" he wrote, adding his online catchphrase: "Let's go!!!!!"
Diddy's support of the group grew when he and drummer Matt Helders became friends after meeting at the Miami Dance Music Conference.