Terrence Thomas Kevin O'Leary, also known as "Mr. Wonderful", is a Canadian investor, entrepreneur, and TV personality . He's best known for his role as a venture capitalist on ABC's Shark Tank and the Canadian show Dragons' Den. O'Leary is the founder of O'Leary Financial Group and the chairman of O'Shares Investments, Beanstox, and O'Leary Ventures. He's also a strategic investor in WonderFi.