If you want to sketch your idol from one of the most famous and captivating boy bands, follow these steps.
Steps
One Direction Cartoon Style

Start by sketching five (or four, since Zayn has left the group) lollipop shapes. These outlines represent the heads of the One Direction members.

Add the details to shape the bodies of the guys.

Outline the defining features of Niall's face and jawline.

Sketch Niall's actual hairstyle.

Continue by drawing Zayn's face and jawline. (You can skip this step since Zayn is no longer part of One Direction.)

Shape Zayn's hairstyle.

Draw Harry's face and outline his jawline.

Define Harry's hairstyle.

Sketch Liam's face and outline his jawline.

Shape Liam's hairstyle.

Draw Louis's face and outline his jawline.

Shape Louis's hairstyle.

Outline Niall's body.

Sketch Zayn's body.

Add the details to reflect Harry's posing posture.

Draw Liam's body.

Draw Louis's body.

Erase the sketch lines.

Apply basic colors to the drawing.

Add highlights and shading.

Apply shadowing to complete the artwork.
Harry Styles Realistic

Begin outlining Harry Styles's head.

Add facial features details.

Draw the defining lines to shape the face.

Continue by sketching the ears and jawline.

Shape Harry Styles's wavy hairstyle, which is also his signature feature. Harry's curly brown hair always sweeps to one side. Remember, when drawing realistically, it's important to emphasize the most distinct or unique characteristics of the subject.

Outline the body and outfit with realistic lines.

Erase the sketch lines.

Color in the drawing.
Liam Payne Realistic

Sketch the head of Liam Payne.

Draw the face and the outline of the jawline.

Continue shaping the hair, neck, and outfit.

Erase the sketch lines.

Apply the base colors.

Highlight and add shading to the drawing.
Louis Tomlinson realistic portrait

Sketch Louis Tomlinson's face and head.

Draw the face and outline the jawline.

Add the defining lines that depict the hairstyle and body shape.

Erase the sketch lines.

Apply the base colors to the drawing.

Add highlights and shading to the artwork.
Niall Horan realistic portrait

Begin sketching Niall Horan's head.

Add sketch lines to define the face shape.

Draw the facial features and the outline of the jawline.

Add defining lines for the hairstyle and body shape.

Fill in the basic colors for the drawing.

Apply highlights and shadows to the painting.

Compile all the completed portraits of the One Direction members.