,Friend‘ was one of the most successful sitcoms on American television. It catapulted the careers of actors Matthew Perry, Courteney Cox Arquette, Lisa Kudrow, David Schwimmer, Matt LeBlanc and Jennifer Aniston to new heights.

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His stellar portrayals of Chandler Bing, Monica Geller, Phoebe Buffay, Ross Geller, Joey Tribbiani and Rachel Green made the characters iconic and memorable.

However, plot and casting mishaps have occurred on several occasions throughout the ten seasons.

A fan discovered that Jennifer Aniston was replaced twice in the show by a different actor. The swap took place in the 4th and 15th episodes of the ninth season, titled ‘the one with the shark‘ And ‘the one with the mugging,

In the fourth episode, Monica and Rachel sit together at a table. Next to Courtney Cox was a different actor – in different clothes with a different hairstyle.

The swap also happened again after 11 episodes. Rachel and Joey enter Monica’s apartment. Another actor stood in place of Jennifer Aniston. Her replacement left fans wondering if Jennifer Aniston was being replaced with another star.

Casting blunders went unnoticed for decades.

‘Friends’ followed the lives of six carefree adults living in Manhattan, New York as they embark on adventures that make their lives both troublesome and eventful.

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The 10 season show was appreciated by the audience and critics. It won several awards and made its actors one of the highest-paid celebrities in the world.