I started watching The Act because the lead character is played by Joey King. I noticed AnnaSophia Robb as well, which is great. I didn't recognise Patricia Arquette and I'm ashamed.

Luckily 'the twist' came in the first episode already rather than at the end of the season, since I suspected something along those lines early on.
#JoeyKing #TheAct #AnnaSophiaRobb
themoviedb.org/tv/82883-the-ac…

The Act

A seasonal anthology series that tells startling, stranger-than-fiction true crime stories with the first season following Gypsy Blanchard, a girl trying to escape the toxic relationship she has with her overprotective mother.

^{The Movie Database}