Fire crews are dealing with a "well-developed" blaze at Airth Castle.
The incident was reported just after 1am this morning.
Six crews are at the derelict hotel.
The Scottish Fire and Rescue Service say no casualties have been reported.
There is no wider threat to the general public.
They're also warning residents that water supplies may be reduced in the area.
Rise in foodbank support this Christmas
Major deal for Grangemouth plastics factory
Call for more support for ASN pupils
Petition for Tillicoultry RAAC homeowners
Redundancies at University of Stirling