Topshop is set to move into the US and sell a range designed by Kate Moss, in one of the country's iconic department stores, a report says.
Topshop reportedly paid Kate Moss £3m to work with the firm.
It will run boutiques in branches of Barneys, the chain which featured heavily in hit TV show Sex And The City, according to the Sunday Times.
The 91-line fashion range designed by the supermodel is due for launch in the UK next month.
Topshop owner Sir Philip Green said the US move would be the "ultimate test".
"The deal with Barneys will enable us to learn and give us a toe in the water," he told the newspaper.
The Kate Moss-designed clothes will be sold in the 19 Barneys stores and through the chain's website after their US launch on 8 May.
This is one week after the much-hyped items - ranging from a £12 ($23.67) vest T-shirt to over £200 for a leather jacket - are made available in the UK.
Topshop was unavailable for comment.
Reports of the move come as the High Street chain plans a large expansion.
It currently has 303 UK stores and 97 overseas - but none in the US.
Analysts have said this expansion could lead to a stock market flotation for the company - part of Sir Philip's Arcadia Group.
The hiring of Ms Moss - reportedly for £3m - has brought plenty of publicity for Topshop, though the move was not without controversy.
The announcement of her joining the ranks coincided with the firm's boss, Jane Shepherdson, leaving the company, and prompting rumours she was unimpressed with the appointment of Ms Moss.
However, both Sir Philip and Ms Shepherdson insisted the events were unrelated.