...as the Antedean ambassador (right).
Mick Fleetwood was the drummer for the group "Fleetwood Mac." He appeared in the TNG episode "Manhunt."
Mick's most recognizable and famous feature is his beard... which he SHAVED off for his roll of a fish-like alien delegate who was intent on blowing up the summit meeting which the USS Enterprise-D was taking him to.
Mick Fleetwood also starred in the 1987 sience fiction movie "The Running Man" as Mick, the leader of an underground resistence movement.