We almost didn't recognize her!

Bradley Cooper and Lady Gaga were hard at work filming their upcoming movie A Star Is Born yesterday in LA, and the singer looks totally different with brunette hair and normal clothes!

The flick is a remake and tells the story of an aging star who mentors a young singer as she finds fame.

Mother Monster just invited all her fans to shoot scenes with her and B-Coop, too! For $12, which will go to her Born This Way foundation, people can be part of a concert scene being filmed for the movie.

"All you Monsters that can attend should get decked out in your most comfortable denim & boots, throw on a Stetson (leave those pink Joanne hats at home) and come out to show your support," she tweeted.

She's ready for her big screen debut!