Answer: No, Kaitlin Olson is not related to Mary-Kate and Ashley Olsen.
Explanation: Kaitlin Olson is an actress known for her roles in shows like “It’s Always Sunny in Philadelphia” and “The Mick.” Mary-Kate and Ashley Olsen are twin sisters and actresses famous for their roles in “Full House” and their fashion lines. Despite sharing the last name “Olsen,” there is no familial relationship between Kaitlin Olson and the Olsen twins.