The role of Kelly, played by Chris Sullivan, was actually 6 roles joined together by Tobe Hooper after he met Sullivan who was initially offered the role of a crew member before they decided that the role should be played by a female.
The role of Kelly was actually 6 roles. These 6 roles were joined together by Tobe Hooper. He met Sullivan. The role should be played by a female. This was what this Sullivan was initially offered the role of a crew member. Before they decided this. The role of Kelly was played by Chris Sullivan.