The bride and groom will arrive in March to get married on the deserted shores of Loch Ossian on windswept Rannoch Moor, a 20-minute walk from remote Corrour station.
The new operators of the Corrour Station Restaurant, Lizzie MacKenzie and Ollie Bennett, both 22, will welcome them.
The service will be followed by a wedding reception in the restaurant, and the newlyweds' first night of marriage will be spent in the station house.
Ms Mackenzie and Mr Bennett only opened in August but have always planned to offer bed and breakfast in the five-bedroom house attached to the restaurant. Mr Bennett said: "We will start the work after New Year, but it is going to have to be ready for what will be our first wedding party," he said.
Between Rannoch and Tulloch stations on the Glasgow to Forth William line, Corrour can only be accessed by train, on foot or by a rough track, with the nearest public road 17 miles away.
But it is where the couple are trying to build a successful business. They had been working in Edinburgh when Ms Mackenzie, who is from the Isle of Seil, south of Oban, heard from an aunt who saw an advert in The Herald from Corrour Estate seeking new tenants for the restaurant.
They opened on August 1 and have been delighted by the flow of customer so far, despite some teething problems.
At the end of June the West Highland rail line was closed after a freight train was derailed by a landslide at Loch Treig.
When the freight wagons were put back on the track they were taken to be stored outside the restaurant.
Mr Bennett said: "These eight big freight wagons were right outside blocking off the entire view of the restaurant from the railway line, which of course provided our main source of business.
"Passengers couldn't see us from the train, so we had various robust conversations with Network Rail and the train company and eventually they were moved, but it was only after more than a month."
Ms Mackenzie said: "We can take 35 at a push and we have had plenty of nights when we have been fully booked.
"Walkers and fishermen come during the day and at night time people come on the train from Fort William. Some come from the hostel two miles away."