Terrence Thomas Kevin O'Leary (born July 9, 1954), also known as Mr. Wonderful, is a Canadian businessman, television personality, and actor. From 2004 to 2014, he appeared on various Canadian television shows, including the business news programs SqueezePlay and The Lang and O'Leary Exchange, as well as the Canadian reality television shows Dragons' Den and Redemption Inc. In 2008, he appeared on Discovery Channel's Project Earth. Since 2009, he has appeared on Shark Tank, the American version of Dragons' Den. In 2025, he made his acting debut in Josh Safdie’s Marty Supreme.