Austen Kroll Sheds New Light on His Bond With His Sister KatieThe bond between Southern Charm’s Austen Kroll and his younger sister of eight years, Katie Kroll, is as unbreakable as ever. How to Watch Southern Charm Season 11 airs on Wednesdays at 9/8c on Bravo. Who is Austen’s sister, Katie Kroll? In 2019, Katie joined Austen on Watch What Happens Live with Andy Cohen as a guest bartender at the clubhouse. He then joked, “Now I have my angel sister and my devil sister here with me.”Find out what’s in store for Austen from Southern Charm’s Season 11 midseason trailer.