Louis Tomlinson's sister Félicité Tomlinson has unfortunately passed away at the age of 18 after suffering a heart attack.
TMZ reports that Félicité was at her apartment in London when she collapsed from a heart attack and someone in the apartment called for an ambulance.
When paramedics showed up, the tried to revive her, but she was pronounced dead at the scene.
Félicité had no warning signs and there were no prior history of heart trouble, but she did suffer from sciatica.
She had quit smoking and drinking in January and she was into fitness.
She was a fashion designer and was planning on publishing a book of her poetry.
Félicité and Louis were very close as she was one of the 7 siblings.
Louis pulled out of a performance on the BBC charity show, Comic Relief as he spends this devastating time with his family.
He lost his mom to cancer back in December 2016 and just released the song "Two Of Us" that was about him and his mom.
The Tomlinson family is in our thoughts and prayers.