Zooey Deschanel has been accused of ''upsetting'' her cast mates on 'New Girl' because of her mood swings.

The 33-year-old actress, who is also a producer on the show, has allegedly started acting like a diva and making demands about her filming schedule on the Fox series.

An insider told RadarOnline.com: ''Although the show has other bosses, including creator Liz Meriwether and producer Katherine Pope, Zooey rules the roost. And she gets moody and starts making rules on the set which is upsetting a lot of the cast and crew members.''

The source added: ''The show's schedule really drives Zooey up a wall, because they're always running behind when the full cast is on set.

''So now, Zooey insists on days ending with scenes that just feature her and one other actor. When that can't happen due to the production schedule, however, she's unhappy and all hell breaks loose.''

The brunette beauty recently revealed she was bullied at school and it made her stronger.

She said: ''A lot of people I knew who didn't struggle, who maybe came from a lot of money or were really pretty - those people actually have a harder time as adults in a way. They don't even understand what it's like to not be pretty. I'm not saying it's good, I don't think people should be mean to each other, but I think it made me stronger.''