Actor and talkshow host James Corden said the news was "incredibly sad" and tweeted to Tomlinson that he is "not on your own in this".
While nothing has been officially confirmed, TMZ is reporting that she was found deceased at her home in the Earls Court area of West London, England on Wednesday (March 13).
The 18-year-old is said to have collapsed on Wednesday in her London apartment.
This tragic news comes three years after Louis and Felicite's mum Johannah died of Leukaemia.
At the time he described the performance as "harder than I ever imagined".
Louis Tomlinson with Liam Payne
Louis has not spoken publicly about this devastating news at this time, but he's reportedly "with family right now and he's devastated".
Her death is now being treated as "unexplained".
Despite attempts to resuscitate Tomlinson, she was pronounced dead on the scene, TMZ said.
The results of a full post-mortem examination will be released in days.
According to The Sun, Louis has been left "devastated and distraught" by the death of his sister, who has been praised as "loveable, caring, bright and beautiful" by "sources close to the One Direction singer".
Louis was told of her death on Wednesday and has cancelled his appearance at an event scheduled for Friday.
Evidence found of massive solar storm
According to the team, the cores recorded a very powerful solar storm occurring in 600 BCE. However, the stream of particles is particularly strong when a solar storm sweeps past.
How To Download/Install Android 10 Q Beta Right Now?
Given the current smartphone design direction of more screen and less bezel, it's unlikely Google has dropped the idea completely. Under the Wi-Fi section, you can share the password in the form of a QR code, or read one such QR code to connect to Wi-Fi.
You have to go into the Alexa app, enable the Apple Music skill, and then log into your Apple Music account to get it to light up. You will also be able to use Alexa to play music on your Fire TV devices with your voice.
Will Wilder strike a deal with DAZN? 'But I think there's an opportunity there for someone to be a mediator to get the fight done. It will be the first time the 36-year-old has fought since Alvarez inflicted the first loss of his career in September.
I hated because they win so much, hated because Tom Brady's hair was long, hated because Bill Belichick wore sweaters. In his one season with the Eagles, Bennett was first on the team with 15 tackles for loss and second with nine sacks.
Increase Hong Kong's reliance on renewable energy to more than 3-4% by 2030 - at least doubling this target. Our generation grew up with the climate crisis and we will have to deal with it for the rest of our lives.
The Trump administration has used the threat of insurance liabilities to pressure countries into blocking Iranian ships. India's optimism stems from a series of meetings following a reduction in oil imports from Iran, officials indicated.
A spokesperson at Christchurch Hospital told CNN that "multiple" casualties had been sent there, but did not confirm the number. He said anybody who was thinking of going to a mosque anywhere in New Zealand on Friday should stay put.
For its part, in the 78th place of the world ranking, Montevideo ranked as the Latin American city with the best quality of life . In 105th place, Chennai ranks as the region's safest city, while Karachi (226) is the least safe.
Following the incident, traffic has been affected. "Even after that if such incident happened, it raises question on the audit". At least three of the dead were women, Mumbai police spokesman Manjunath Singe said. "A slab of the bridge had collapsed".
Paul Scholes quits after 31 days as Oldham boss
The 44-year-old took charge of just seven matches since he joined them in February and recorded just one win in the process. Whether the former England worldwide decides to continue in management or return to punditry remains to be seen.
I trust BCCI, will be back to cricket soon, says Sreesanth
The Supreme Court, however, has not upheld the findings of guilt made by the disciplinary committee against Sreesanth . In the wake of these new developments, Bhuvaneswari, Sreesanth's wife said that the cricketer has finally got justice.
16-year-old Swedish girl nominated for Nobel Peace Prize
National politicians, worldwide officials, academics and previous winners are among those who can nominate potential recipients. The names of nominators and nominees are not normally made public until 50 years have elapsed, it adds.
10 arrested in Gujarat for playing PUBG despite the ban
Rohit Raval, Rajkot Special Operations Group police inspector, said their phones had been seized as part of the investigation. They were also asked to advise parents to keep an eye on children against the highly addictive game.
K.J. Wright re-signing with Seahawks
NFL Network reported Seattle had enticed Fluker to return with a two-year contract that could be worth up to $9 million. Seattle lost Sweezy to the Arizona Cardinals on Wednesday, the first day that free agents could sign with other teams.
Bears sign safety Clinton-Dix to 1-year deal
New Bears cornerback Buster Skrine spent time with Clinton-Dix on Thursday morning, during the latter's visit to the Bears. He'll help the Bears overcome the loss of Adrian Amos , who signed with the Packers in free agency this year.
Naomi Osaka finds positives despite Indian Wells loss
Osaka was completely outplayed as 23rd seed Bencic claimed a stunning 6-3 6-1 victory in the California desert on Tuesday. Open final in a match best remembered for the American's heated argument with the chair umpire as Osaka looked on.
Fact-checking Trump's tweets on Lisa Page testimony
He said he didn't recall specifically writing it, but says he now thinks the "we" he was talking about was the country at large. Strzok was dismissed from Robert Mueller's team once the text messages were uncovered by internal investigations.
Disney, Fox merger set to close March 20
"Just in: Disney says its acquisition of most of Fox will take effect on Wednesday, March 20", Brian Stelter tweeted . What's more, Disney will be able to increase its stake in Hulu by half - from 30 to 60 percent.