Searxng/Love Story FX TV series t Celebrity Discover Grace Gummer, the actress behind Caroline Kennedy in FX's Love Story. Learn key facts about her career, family, and rise to fame in 2026. May 4, 2026 AceShowbiz - Grace Gummer portrays Caroline Kennedy in the FX series Love Story, which debuted in late 2025 and quickly became a major topic of discussion in early 2026. Following the show's conclusion, much attention has turned to the talented cast behind the real-life characters, including Grace Gummer.