Louis Tomlinson's Sister, Félicité Tomlinson, Dies From Heart Attack at Age 18 Félicité passed away suddenly on March 13, 2019, in her London apartment. Sources close to the family say there were absolutely no warning signs, and that the family has no known history of heart issues. Félicité did however suffer from sciatica, a painful condition that affects the sciatic nerve in the lower back and legs. She is one of six younger siblings of singer Louis Tomlinson. Following his sister’s death, Louis pulled out of his Friday night performance on the BBC charity show, Comic Relief. The Tomlinson family is devastated, having just previously lost their mother, Johannah, to leukemia in 2016.
