<human>:  How many characters are there in the play, ‘The Odd Couple’?
<bot>: The Odd Couple has two main characters, Felix Ungar and Oscar Madison. Oscar Madison is the more well-known character, and is played by Tony Randall. Felix Ungar is played by Walter Matthau. There are also a number of supporting characters, including the maid, played by Audrey Meadows, and a neighbor, played by Jack Klugman.