Split

While the mental divisions of those with dissociative identity disorder have long fascinated and eluded science, it is believed that some can also manifest unique physical attributes for each personality, a cognitive and physiological prism within a single being.  Though Kevin (James McAvoy) has evidenced 23 personalities to his trusted psychiatrist, Dr. Fletcher (Betty Buckley), there remains one still submerged who is set to materialize and dominate all the others. Compelled to abduct three teenage girls led by the willful, observant Casey (Anya Taylor-Joy, The Witch), Kevin reaches a war for survival among all of those contained within him—as well as everyone around him—as the walls between his compartments shatter apart.

Finally - a movie from M Night Shalamalalalalan that I liked instantly and wasn't annoyed at any point or had to think for a while on whether it was good or bad.  The trailer for this looked awesome and I was very strongly braced for a massive disappointment but ended up liking it very much.  Don't want to give anything away but while the split personality went a little over the top towards the end, the final scene oh $hit moment was great.

I would recommend people checking this out.  It was an enjoyable watch and James McAvoy was excellent in it.