The designer - whose celebrity fans include the Duchess of Cambridge, Kate Beckinsale and Kate Winslet - is a huge fan of the Oscar-winning actress and says some of the items from her latest collection would be perfect for her.
When asked who she would like to work with, Jenny said: ''Cate Blanchett - she's the one we haven't dressed! The new collection is inspired by Film Noir - by the heroines in particular; the femme fatale - and she'd look perfect in it. Especially this silver backless dress.''
While her designs are worn by many Hollywood A-listers, Jenny wants to make her creations more accessible to others, which is why she's teamed up with British high street chain Debenhams.
She told vogue.co.uk: ''Young girls - like friends of my daughter's - always ask if we do prom dresses, and we do dresses that would be lovely but £2,000 isn't realistic for most girls. The Debenhams collection will hopefully be great for that sort of event, because the price point is much lower. We often get brides asking about dresses for younger bridesmaids as well - although the collection has pieces for all ages. To be honest, I'm really excited to see how it sells when the launch comes. I'm working on my third collection for Debenhams now - for next summer - but nothing has gone on sale yet, so it will be great to see what's popular; what people really like.''
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