The 20-year-old uploaded pictures of the pair together, including ones when they were little kids and she acknowledged that Félicité was now reunited with their late mother Johannah Deakin, who passed away following a battle with leukemia in 2016.
She captioned the post: “My Fizzy, my baby sister, my best friend. I’m incomplete without you, I’m empty. I can’t picture my life without you. I wish we could have lived life together for a little longer. Mama needed you and you needed her, you’re finally together again. I love you always, Dotty x”
Félicité’s death is still being treated as “unexplained” but tests are currently underway to confirm her cause of death.
Louis is yet to publicly address his sister’s passing but he did pull out of a performance for Comic Relief in the UK last weekend.
Our thoughts and prayers are with the Tomlinson's through this hard time.