Christmas at Castle Hart was filmed on location in the beautiful country of Ireland, specifically in the picturesque town of Trim. This charming town is steeped in history and is known for its breathtaking scenery, making it an ideal setting for the romantic holiday movie. From the town's medieval castle to its winding streets and cobblestone alleyways, there's no shortage of enchanting backdrops for the film. So, if you're ever planning a trip to Ireland, be sure to add Trim to your itinerary!