Asos has signed an agreement to open a new fulfilment centre in the US.
It is investing around $40m (£30.7m) in fitting out the unit, which is located in Union City near Atlanta, Georgia.
Asos said it expects fit-out to begin shortly, with operations kicking off next autumn.
It said the investment will create a 10 million-unit capacity facility with the “opportunity to expand further at the appropriate time”.
Asos CEO Nick Beighton said: “This agreement is a major step forward for Asos in the US and demonstrates the opportunity we believe lies ahead in this key market.
“Our US fulfilment centre will enable us to significantly develop our proposition for our 20-something US customers supporting our continued growth and future ambitions.”
Beighton said its US business delivered 39% growth in constant currency terms in the first six months of the financial year, following sales of £179m in the year ending August 2016.
The investment comes after Asos revealed that group sales were up 32% to £660m for the four months to 30 June, driven by strong international growth. Just under two-thirds (60%) of its sales are from outside the UK.
It has been expanding its international delivery capabilities and has recently completely the first phase of work on its second European warehouse, near Berlin.