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In The One with the Lesbian Wedding (1996), the group predicts that Chandler will be the last of them to marry. Ironically, it is Chandler that ends up getting married first as he and Monica are the first to have a committed marriage that doesn't end in divorce and the others (except Joey) all have unsuccessful marriages until Phoebe marries Mike Hannigan in The One with Phoebe's Wedding (2004). In an another irony, Joey serves as the officiant for both of the weddings that have long-term marriages even though he never gets married himself on the show.
Joey was originally written as a jerk. When Matt LeBlanc questioned why the others would be friends with him, the character was changed.
When Matt LeBlanc auditioned for the role of Joey, he had eleven dollars to his name. When the cast got their first paychecks, the first thing that LeBlanc bought was a hot dinner. Courteney Cox bought a car.
When Courteney Cox dressed as fat Monica for the first time, Matthew Perry walked right past her without recognizing her.
Courteney Cox was originally supposed to play Rachel. In Friends: The Reunion (2021), she explained that she asked to play Monica instead, since she related to her more.
Lisa Kudrow and her best friend wrote "Smelly Cat" one night when they were drunk, and it eventually got written into the show.