Preheat the oven to 425°F (220°C).
Rinse the chicken under cold water and pat it dry with paper towels.
In a small bowl, mix together olive oil, salt, black pepper, garlic powder, paprika, dried thyme, and dried rosemary.
Rub the chicken all over with the spice mixture, ensuring it's evenly coated.
Optionally, let the chicken marinate in the refrigerator for 1-2 hours for enhanced flavor.
Place the lemon halves inside the chicken cavity.
Tie the chicken legs together with kitchen twine for more even cooking.
Place the chicken on a roasting pan or a baking sheet with a wire rack.
Roast in the preheated oven for about 1 hour and 15 minutes or until the internal temperature reaches 165°F (74°C).
If the skin is getting too brown, you can tent it with foil during the last 30 minutes of cooking.
Once done, let the chicken rest for 10-15 minutes before carving.
Garnish with fresh herbs and serve.