Katherine Heigl is called an unliked diva after numerous problems on set of her latest film!

I need a few assistants to fetch me my coke classics........

Katherine Heigl is quickly earning the reputation for being one of Hollywood’s most difficult divas.

The Grey’s Anatomy star has come under fire on the set of her latest movie Five Killers for being “extremely unprofessional,” flaking on meetings and making ridiculous demands.

Apparently the 30-year-old star has been demanding that she be flown by private plane to and from the film’s international locations, and has also requested “crazy amounts of security."

But the rumors hardly end there.

According to an extra on the film 27 Dresses, "Heigl reportedly refused to film any scenes until her pregnant assistant ran around and got her a Coke Zero. She refused to eat lunch next to anyone or have anyone speak to her once the cameras stopped rolling."

“No one on the crew likes her,” an inside source said.

“She has a sense of entitlement that is really off-putting,” another source learned. “Many directors that she’s worked with in the past do not want to work with her again.”