Katie McElhenney is an American actress, writer, and book author. She is known for her works in It’s Always Sunny and Mythic Quest.

Who is Rob McElhenney’s sister?

Rob McElhenney and Katie McElhenney are related by blood. Rob was raised alongside a sister named Katie McElhenney. Katie McElhenney is rising into fame alongside her popular brother who has been extremely supportive of his talented sister.

She has been able to garner quite a fan following by her work as people have been loving her writing in books as well as in entertainment projects. Katie McElhenney is an American writer as well as an actress who also happens to be the half-sister of popular actor Rob McElhenney.

She is among two sisters of actor Rob as he also has another step sister and two brothers too， but all of them have a great bond with each other. Similarly， Katie seems to be very close to her elder brother as they also had a professional association with him as she is one of the writers in Mythic Quest.