Garry Chalk (born February 17, 1952) is a British-born Canadian actor and voice actor. He has provided the voices for Optimus Primal of Beast Wars: Transformers and Beast Machines, as well the Optimus Prime in the anime English dubs of Transformers: Armada, Transformers Energon, and Transformers: Cybertron, and also was the third American voice of Dr. Robotnik for Sonic Underground. He has lent his voice to over 30 animated television series and has been in films such as The Fly II, Godzilla and Freddy vs. Jason. He played the recurring role of Col. Chekov on Stargate SG-1. He is perhaps best known for his recurring role as Inspector Andrew Pawlachuk on Cold Squad. A highly-prolific character actor, most of his career has been in film and television, usually portraying a corrupt law enforcement officer. He had a recurring role on Cold Squad for four years, for which he won Gemini Awards in two consecutive years, and until the close of its ninth season had a recurring role on the science-fiction series Stargate SG-1. Known for his perfect enunciation and his mellifluous deep voice, Chalk is also a veteran of over 1,500 animated productions including Class of the Titans, and the 2002 remake of He-Man and the Masters of the Universe. He is also known for his voice work in the Transformers franchise as the voice of Optimus Primal in Beast Wars and Beast Machines, and as Optimus Prime in the Unicron Trilogy. He also voiced the original Megatron in an episode of Beast Wars. In the 2000s, he appeared occasionally in the Sci-Fi Channel shows Eureka, as Col. Briggs and Painkiller Jane, as Ruben Hennessey.  Chalk is a proficient guitarist and singer and often performs his music when he makes public appearances and at conventions.

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