The actress, who plays Rachel Berry in the musical series, said that the boys are banned from their girlie meetings.
She told Glamour, 'Sometimes all the girls meet in one of the trailers on set, and we have snacks and gossip.
'The boys come and knock on the door and beg to come in, but they can't. It's girls only. We call it The First Wives' Club.'
The 24-year-old added that she had no idea how popular Glee had become until the cast were invited to meet the President Barack Obama.
'It took me a while to realise how big Glee had become. We were so busy filming our episodes. I don't think any of us saw it coming. We were like, working, working, working - next moment we were invited to the White House,' she said.