Materials Needed:

1. Reference Image: Find a clear image of Princess Celestia to use as a reference.
2. Drawing Paper or Printable Coloring Page Template: You can either draw directly on paper or use a printable template.
3. Pencil & Eraser: To sketch out the initial lines lightly.
4. Black Marker or Pen: For outlining the final drawing.
5. Coloring Tools: Colored pencils, crayons, markers, or paints for coloring.

Steps:

1. Reference Image: Find a good reference picture of Princess Celestia. This will help you in understanding her details, colors, and features.

2. Sketching: Start with a light pencil sketch. Draw the basic shapes – her body, head, mane, tail, and wings. Pay attention to her facial features, horn, and crown.

3. Details: Add details like her eyes, mane, tail, and the unique markings on her body. Take your time to get the shapes and proportions right. Don’t worry about perfection at this stage.

4. Outline: Once you’re satisfied with your sketch, carefully outline it with a black marker or pen. Trace over the lines you want to keep, like the contours of her body, facial details, and her accessories.

5. Erasing: Let the ink dry, then erase any remaining pencil lines. This will leave you with a clean, crisp outline of Princess Celestia.

6. Coloring: Now comes the fun part! Use your chosen coloring tools to bring Princess Celestia to life. Match her colors as closely as possible to the reference image or let your imagination run wild with different shades!

7. Finishing Touches: Once you’ve colored her in, take a step back and see if there are any final touches or details you’d like to add. Check if any areas need more shading or highlighting.

8. Sharing or Displaying: Voila! Your Princess Celestia coloring page is complete. You can display it, give it as a gift, or even share it online with other My Little Pony fans!