Guy O'Sullivan was a British-born reality television producer best known for bringing hit series such as Storage Wars to Canadian television.

O’Sullivan also contributed to the series Canada’s Worst Handyman, Hardcore Heroes, Come Dine with Me Canada, MasterChef Canada, Canada’s Worst Driver and True North Calling.

In 2004, O'Sullivan launched Proper Television and produced a local version of Canada’s Worst Driver for Discovery Channel. He then adapted more international formats for the Canadian market, initially via a distribution deal with ITV Global Entertainment.

Proper TV also developed and produced original formats for the global market, including Last Car Standing, Redemption Inc. and Four Weddings Canada, which TLC aired in the U.S. as Four Weddings.

O'Sullivan died April 8, 2017, in Toronto, Ontario, Canada. He was 49.

At the time of his passing, he was working on adapting The Great British Bake Off for Canadian television.