Jennifer Aniston was almost replaced in her role as Rachel Green in Friends. Téa Leoni was the producers' original choice, but she turned it down for another show. Courteney Cox was also considered for the part. Fortunately, Aniston stayed committed to Friends, and the rest is history. Rachel Green evolved from a spoiled rich girl into a successful businesswoman over ten seasons, and Aniston's performance was an essential part of the show's success.
