Louis Tomlinson has broken his social media silence after his 18-year-old sister Felicite died of a suspected heart attack last month.

Tomlinson, 27, who lost his mother Johannah Deakin after a battle with leukemia in December 2016, posted on Twitter Wednesday: “Just wanted to thank everyone for their lovely words over the past couple of weeks.”

“Back in the studio today to vocal something I wrote a few months ago. Sending you all loads of love x”

Felicite unexpectedly passed away on March 13 after she collapsed in her fourth-floor apartment in West London.

RELATED: Louis Tomlinson Remembers His Late Mother In Interview Recorded Days Before Sister’s Death

A person who was with her at the time called 999 (the U.K. version of 911), and emergency responders quickly arrived on the scene.

Despite extensive efforts to resuscitate the aspiring fashion designer — nicknamed “Fizzy” — she was pronounced dead at the scene.

In a statement to Metro.co.uk, the London Ambulance Service said, “We were called at 12:51 p.m. We sent two ambulance crews, a single responder in a car and an advanced paramedic to the scene. Sadly, despite efforts of our medics, a person died.”

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Stars We’ve Lost In 2019