Mia,charli and Dixie are all sisters?

Yes mia,charli and Dixie are sisters. In one of Charli’s tik tok’s you can see a photo of Mia in the background.Also on a live stream Dixie got a call from someone named Mia. How do we know? Because Dixie said to charli “it’s Mia. She’s calling us.” Also if you are one of charlis friends on tik tok she has tagged miabiddle2. So the photo,the live stream and the tik tok has made everything clear that they are sisters.