Preheat your oven to 375°F (190°C).
In a skillet, cook the ground beef over medium heat until browned. Drain any excess fat.
In a baking dish, spread a thin layer of marinara sauce on the bottom.
Layer half of the frozen ravioli over the sauce.
Spread half of the cooked ground beef over the ravioli.
Pour half of the remaining marinara sauce over the beef and sprinkle with half of the mozzarella and Parmesan cheese.
Repeat the layers with the remaining ravioli, beef, sauce, and cheeses.
Cover the baking dish with aluminum foil and bake for 20 minutes.
Remove the foil and bake for an additional 10 minutes, or until the cheese is bubbly and golden.
Let it cool for a few minutes before serving.