It’s Always Sunny in Philadelphia' costars Kaitlin Olson and Rob McElhenney share two sons together: Axel and Leo. Here’s ...

John C. Reilly and his wife, Alison Dickey, share two children: Leo and Arlo. Here’s everything to know about John C. Reilly's sons.

In 1998, they welcomed their first son, Leo, with Arlo joining the family a few years later. When his sons were still kids, he told Parade in 2008 that he was dreading "the day they leave the ...