Friends co-creator Marta Kauffman has issued an apology for the 'lack of diversity' in the series 28 years on from its debut.The popular sitcom was a huge global hit throughout the 90s and into the early 00s after its 1994 launch, getting fans hooked from its first episode.But now Marta has admitted feeling that she is 'embarrassed' that she didn't make the show more inclusive at its inception due to the all-white main cast.READ MORE: Jennifer Aniston denies secret David Schwimmer romp after admitting to on-set crushSpeaking in an interview with the Los Angeles Times she said: “I’ve learned a lot in the last 20 years.“Admitting and accepting guilt is not easy. It’s painful looking at yourself in the mirror.