Louis Tomlinson's Sister Felicite, 18, Dies Suddenly at Her London Apartment

The teen died in her London apartment.

Felicite went into cardiac arrest before collapsing, according to reports.

One Direction star Louis Tomlinson’s 18-year-old sister, Felicite, suddenly died at her London apartment on Wednesday. 

Felicite went into cardiac arrest before collapsing, according to reports. A friend reportedly called 911, but first responders were not able to resuscitate the teen. 

A statement from the Metropolitan Police Service said, “A post-mortem examination will take place in due course."

Louis, 27, canceled a scheduled appearance Friday at BBC’s Comic Relief after he received news of the death. 

Louis was reportedly set to perform “Two of Us,” his latest single dedicated to his mom, Johannah Deakin, who died of leukemia in 2016. 

The star had previously said playing the song for his younger sisters – Felicite, Charlotte, and twins Pheobe and Daisy – was “tough.”

Fans expressed their support on social media after hearing of the loss. 

“This is tough... This is all too much... First his mom and now his sister… I'm so sorry for u lost Louis Tomlinson,” one Twitter user wrote.