The star went on to reveal things weren’t quite as light-hearted backstage as it came across on TV.
Jennifer added: “Sometimes I think people want to hear my ad libs when I get on a show and they really don’t.
“Sometimes I come in and throw some lines and they come up and say, ‘You know Jennifer, we’re just going to stick to the script’.
“…That was a serious show. The vibe was pretty serious; I don’t think they wanted my input and I could really feel that…sticking to their own stuff. So I didn’t have the guts to push.”
Watch Friends daily on Comedy Central – The Complete Series 1-10 is available now on Blu-ray, DVD and Netflix.
Tickets for FriendsFestive can be purchased at www.FriendsFestive.co.uk. Tickets cost £34.50 including booking fee and a festive drink.