Miller's first jobs were with
Alexander McQueen and
Matthew Williamson. In 2006 it was announced that Miller's sister
Sienna was to design a "fashion capsule" for
Pepe Jeans; this project developed into a fashion label called Twenty8Twelve, still backed by Pepe Jeans, and its first collection, designed by the two sisters, was shown in September 2007. They worked together as joint creative directors until 2012. In October of that year Miller left Twenty8Twelve and launched her own collection, "Savannah". The first Savannah line focused on "luxurious basics" and was marketed by Nelly.com. This led on to a Spring 2013 collection, reported as "heavily influenced by the 1970s". The logo of the "Savannah" line is a
swallow. Sometimes associated with the term "
boho-chic", and the
Sunday Times used the term "rural chic" for a collection she designed and modelled for the Hong Kong label
Shanghai Tang. and
Sunday Times Style. In 2023, she made a comeback in ready-to-wear with the launch of the womenswear brand Vivere, tagged as 'new smart'. ==Personal life==