Brian Grellis (born 1937) is a British actor, best known for his role in the television series Z-Cars as Det. Sgt. Bowker.
Other TV credits include: Softly, Softly, Pathfinders, The Regiment, Whatever Happened to the Likely Lads?, The Onedin Line, The Good Life, Last of the Summer Wine, Survivors, Enemy at the Door, Doctor Who (in the serials Revenge of the Cybermen, The Invisible Enemy and Snakedance), The Gentle Touch, Minder, Bergerac and Threads.
Grellis is also known for his role as Phidian, the aide to Sir Hilary Bray in the 1969 James Bond film On Her Majesty's Secret Service; originally, this part was slated to be much larger, with a long chase scene involving Phidian after being revealed as a mole of the film's villain, but this was scrapped partway through filming of the sequence due to budgetary restrictions, leaving Grellis with one line of dialogue and less than fifteen seconds of screentime in the finished film.