Rob McElhenney Rob McElhenney

Rob McElhenny has landed a guest-starring role on The Mindy Project, E! Online reports.

The It's Always Sunny in Philadelphia star will play sleazy criminal Lou Tookers, Morgan's (Ike Barinholtz) cousin, who comes to the office to fix their computers.

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McElhenny joins the recently cast Rhea Perlman, who will play Danny's (Chris Messina) mother.

The Mindy Project premieres Sept. 16 at 9:30/8:30c on Fox.