Really good film. If you haven't gotten around to seeing this movie I highly recommend it.

Mud (Matthew McConaughey): ENFJ
Juniper (Reese Witherspoon): ISFP
Ellis (Tye Sheridan): INFJ
Neckbone (Jacob Lofland): ISTP
Tom Blakenship (Sam Shepard): ISTJ
Senior (Ray McKinnon): ISTJ
Gaelen (Michael Shannon): ENTP

My guesses.