Preheat the oven to 350 degrees F (175 degrees C).

Combine green beans, corn, condensed soup, Cheddar cheese, sour cream, celery, and onion in a large bowl; mix thoroughly. Pour mixture into an 8-inch square baking dish and spread evenly.

Combine crackers and melted butter in a small bowl; mix until crackers are evenly coated. Pour over vegetable mixture in the baking dish and spread evenly without stirring. Sprinkle almonds on top.

Bake in the preheated oven until set, about 30 minutes.