Preheat oven to 350°. Spread rice into a greased 13x9-in. baking dish. In a large skillet, heat butter over medium-high heat. Add celery and onion; cook and stir until tender, 6-8 minutes. Stir in flour until blended; gradually whisk in cream. Bring to a boil, stirring constantly; cook and stir until thickened, 1-2 minutes., Stir in seafood seasoning, salt, pepper sauce and pepper. Fold in shrimp and crab. Spoon over rice. Sprinkle with cheese. Bake, covered, until shrimp turn pink, 40-45 minutes. Let stand 5 minutes. To Make Ahead: Can be made a day in advance. Prepare recipe as directed, cooling sauce slightly before adding shrimp and crab. Cover and refrigerate overnight. Remove from the refrigerator 30 minutes before baking. Bake as directed.