Sean Cullen (comedian, singer, impressionist)

Seán Cullen (born 1965) is a Canadian comedian who as well as being a very accomplished singer and musician, can also do uncanny impressions of a number of music icons, including Van Morrison.
Cullen was a member of the comedy music trio Corky and the Juice Pigs, who scored an online hit with the song "Only Gay Eskimo".
In 2003, Cullen produced his own sitcom, The Seán Cullen Show, for the Canadian network CBC, which only lasted for six episodes, and a Christmas special.
In 2008, Cullen was a contestant on NBC's Last Comic Standing 6. He became a finalist on the show, making it through the auditions, Las Vegas semi-finals, and the "house" round. Cullen was eliminated on the July 31, 2008 episode after the first of two rounds of home viewer voting which determined the final winner.

Outside of performance, Cullen has written three books in his own Hamish X series of novels for young adults,[7] including Hamish X and The Cheese Pirates, Hamish X and The Hollow Mountain and Hamish X Goes To Providence, Rhode Island. Cullen has also started writing the Chronicles of the Misplaced Prince series. The first book The Prince of Neither here Nor There was released on August 11 2009.

Peter Cullen (Actor, voice-over artist)

Peter Cullen (born July 28th, 1941) is a Canadian voice actor, known as the voice of Optimus Prime in the original Transformers cartoon series from the 1980s. Cullen reprised his role as Optimus Prime in Michael Bay's live-action Transformers film series and the newly released Transformers: War for Cybertron video game.
Peter was born in Montreal, Quebec and as well as his extensive Transformer work, he was also the voice of KARR in the Knight Rider TV show (KARR was KITT's prototype which went rogue). He has also provided voice-overs for everything from The Gummi Bears to Duck Tales, Scooby Doo, Rescue Rangers, Rude Dog and the Dweebs, Garfield, Brave Starr and Visionaries.