Kathryn Dennis. Courtesy of Kathryn Dennis/Instagram Southern Charm alum Kathryn Dennis has experienced a series of ups and downs in the public eye. The former Bravo star made her debut on the network in 2014 when she appeared as a "friend of" the Southern Charm cast during the show's first season. When the fan-favorite series returned for a second season the following year, she was upped to main cast member as her relationship with Thomas Ravenel played out on screen.