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After 238 episodes, it's hard to imagine any different permutation of actors playing the Central Perk Six. But in one of the new Blu-ray documentaries on Friends: The Complete Series (out November 13), co-creator Marta Kauffman reveals a very familiar actress almost beat out Jennifer Aniston!

VIDEO - Friends: The Classic Quotes

"We offered Rachel to Courteney Cox," Kauffman reveals in ETonline's exclusive sneak-peek clip. And while Cox was honored, she had her eye on a different character: Monica.

To find out how Courteney Cox's pre-pilot character choice forever changed the course of Friends, watch the video above. And pre-order Friends: The Complete Series on Blu-ray here!