The actress hit the Mortal Instruments: City of Bones premiere in Los Angeles last night (12 August) looking red hot in Jenny Packham trousers and a floral top but it was her perspex Jenny Packham bag that really stole the show.
So what does Julianne tote when she's attending a glam do?
Her white iPhone 5, Chanel compact and matching Chanel lippy all made an appearance but what about her money, chewing gum and gazillion kirby grips? Or the receipts and emergency false eyelash glue?
Nope, our night-out clutch would definitely not look so polished!
Want to get in on the trend? Millie Mackintosh loves it too!
Add some zing with this neon number, £12, from Boohoo or keep it simple with this envelope bag, £24.99, from Missguided.
Just leave the shabby make-up at home!
What do you think of the see-through clutch bag trend? Tell us below as the best comment from across the site each week wins £50!