Richard John Cyril Allen (born 1 November 1963) is an English musician who has been the drummer of the hard rock band Def Leppard since 1978.

He overcame the amputation of his left arm in January 1985 and continued to play with the band, which went on to its most commercially successful phase.

On the afternoon of 31 December 1984, Allen was involved in a car crash with his girlfriend, Miriam Barendsen, on the A57 road in the countryside a few miles west of Sheffield.

This went on for several miles until, in frustration, he accelerated to pass, at which point he lost control of the left-hand-drive Corvette C4, which hit a dry stone wall and entered a field.

The company primarily sells merchandise featuring "Stick Rick", an illustrated character representing Allen.

In 1995, he was arrested for spousal abuse and was sentenced to a work crew and ordered to attend Alcoholics Anonymous meetings.

[25] On the weekend of 12 March 2023, while standing in the parking valet area of the Four Seasons Hotel in Fort Lauderdale, Florida, where he was staying for a performance at the Seminole Hard Rock Hotel & Casino Hollywood, Allen was attacked by a "spring-breaker" who intentionally ran toward and collided with him, knocking him to the ground.