To a pot of boiling water add the ziti pasta and cook it according to the box instructions. Drain.
To a large bowl combine the drained ziti, marinara sauce, and Alfredo sauce.
Grease a 9x13 baking dish with non-stick spray.
Pour the ziti mixture into the baking dish. Cover with aluminum foil bake for 25 minutes uncover and continue to bake for and additional 10 minutes. Enjoy!