Felix Ungar is a fictional character from the classic television sitcom The Odd Couple, created by Neil Simon. He is portrayed as a fastidious and neat individual, often clashing with his messy roommate, Oscar Madison. Their contrasting personalities create a comedic dynamic that has resonated with audiences since the show's debut in the 1970s. Felix's obsessive cleanliness and meticulous nature serve as a foil to Oscar's carefree and disorganized lifestyle. This relationship not only drives the humor of the series but also explores themes of friendship and compatibility, making Felix a memorable character in television history.