The pair, who have been together 11 years, say they never imagined getting married in one of the most remote places on Earth.
Tom Sylvester and Julie Baum were married at the Rothera Research Station on Adelaide Island to the west of the Antarctic Peninsula.
Ms Baum's dress had orange fabric from an old tent and wedding pictures were taken in temperatures of -9C (15F).
Mr Sylvester said: "Antarctica is an incredibly beautiful place and we have made such great friends here."
He said the setting "couldn't be better".
Both are experienced mountaineers, instructors and expedition leaders and have been engaged for three years.
Their wedding was registered with the BAT Government, based in the Foreign & Commonwealth Office, and the marriage is valid in the UK.
It is the first marriage since the BAT marriage law was reformed to make it easier for marriages to be arranged in the territory.
Read more BBC