Susan Murphy was once a normal woman until she was hit by a radioactive meteor. This resulted in her being mutated and giving her the ability to grow 49 feet tall. The character of Susan Murphy is voiced by Reese Witherspoon in the movie. If you would like to learn how to draw Susan Murphy, Ginormica from Monsters vs. Aliens, follow these steps. Step 1 Draw a straight line with a large circle over it to start this how to draw Susan Murphy, Ginormica from Monsters vs. Aliens art lesson. Step 2 Carefully uses short pencil lines to sketch her hair and the outline of her body. Determine where her facial features will go by using a series of horizontal lines. Step 3 Before coloring her in, make sure you have finished sketching all of her face. Use a dark gray for her clothes and a light gray to highlight her hair. You have now learned how to draw Susan Murphy, Ginormica from Monsters vs. Aliens.