They might be the best of friends, but it looks like even Courteney Cox was a little jealous of Jennifer Aniston and all the attention she received for her popular 'Rachel' hairstyle. The former Friends star opened up to Jimmy Kimmel Live on Monday, admitting that she was a little envious of her best friend's iconic look during their Friends heyday two decades ago.

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While 'The Rachel' instantly took off with thousands of women copying Jennifer Aniston's hairstyle, Cox says that she was disappointed that 'The Monica' took off.

According to E! News, she said, "It kind of bums me out. Why didn't they? I mean, we had the same hairdresser! I don't understand... I just kept changing mine. I was like, if you don't like it, then I'll just keep doing it. Nothing ever stuck."

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Just last month, Cox, Aniston and their former co-star Lisa Kudrow participated in a mini-Friends reunion in a mock set that resembled Monica's apartment.

A (jokingly) irritated Aniston reluctantly participated in the skit while being surprised by both Cox and Kudrow's guest appearances. Before they read their lines together for their mock scene, Kimmel told Aniston, "I loved the show so much I actually wrote some fan fiction. I wrote myself into it as Ross. I was wondering if you would do a scene from it with me?"

After the skit, Kimmel explained that Aniston was just "acting" and that she wasn't upset by the skit at all. Friends is currently celebrating it's 20th anniversary since it debuted on the NBC network back in 1994.

Tags: Jennifer Aniston Courteney Cox