I think it's nice. well rendered. but I'm going to give you some unsolicited feedback. I'm a college admissions counselor for a small fine arts school, part of my job is critiquing high-school portfolios (about 200 a year) out of those 200 portfolios, I see about 10 to 20 Audrey Hepburn portraits all of this same image. This might be part of the reason your art teacher wasn't so happy with it, she probably wants you to be pushing yourself artistically and thinking out of the box. maybe you could use her as inspiration for a more original work? I'm not trying to bum you out or piss you off (so please don't be angry), just trying to give some perspective. Take the idea of Audrey (gamine, classic, demure, ladylike, etc...) and expand upon it, think about why you are drawn to her, what feelings do you get when you think of her... and make something fantastic and never seen before!!!My teacher gave me the image, the assignment was to redraw it on a much larger scale.
Thank you for the critique though
huh. well then I don't know what your teachers problem is, because it seems you've done the assignment. HS art teachers can be like that though. don't let it bum you out, keep working and keep having fun with your art