A new direct daily Stirling to London train service is set to launch in the middle of 2026.
Lumo will run four services a day.
The trains will also call at Larbert, and will run down the West Coast route.
The services were initially due to start this year, but were pushed back.
At the moment, two trains a day stop via Stirling on their way to London.
FirstGroup chief executive Graham Sutherland said: "Our investment and capabilities in open access rail have delivered reliable, value-for-money services, grown rail demand and helped to spur economic growth and connect communities.
"We look forward to doing the same on our new services."
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