Cameron Diaz as Annie's Miss Hannigan: See the First Photo
11/13/2013 AT 10:45 AM EST
The actress, 41, Tweeted a photo of herself in costume – big hoop earrings, a heap of thick chain necklaces (one of them spells out "HBomb"), dark makeup and even darker roots.
"I want you to meet someone," Diaz writes in the caption. "Her name is Ms. Hannigan. She ain't nice and she ain't pretty. #Annie"
Diaz plays opposite 10-year-old Quvenzhané Wallis, who stars in the title role and was nominated for an Academy Award for her precocious film debut in 2012's Beasts of the Southern Wild.
Diaz will be singing and dancing in the film, which also stars Jamie Foxx, Rose Byrne and Bobby Cannavale.
Annie is scheduled to hit theaters Dec. 19, 2014.