Well you might feel bored since most of recent photos are all in color, you need to sketch by drawing pencil but it takes too much time then just follow and try this step by step tutorial, this will help you to turn any color photos into pencil sketch in few minutes. Here are the following tutorials:

1. First change the Image Mode to RGB.
2. Copy the Background by dragging it to the new layer icon.
3. For a color photo, Desaturate it. Image>Adjust>Desaturate.
4. This turn the copy into a grayscale layer, pulling the color out of it. Drag this layer to the new layer icon.
5. Press Command I or Control I  to Invert the colors. It will look like a negative.
6. At this layer change Blending Mode to Color Dodge. It will look mostly white.
7. You can use any ONE of the following filters on this layer to bring in the sketch look. Play with the settings and angles where applicable. Be sure to push the settings and observe the results of different amounts.
   Filters: Blur> Gaussian, or Blur> Motion Blur, Blur> Radial Blur, or Noise>Median, or Noise>Dust & Scratches.
8. Ît is on this “Color Dodge” layer that you can darken or lighten the graphite look by using either black or white with a pressure sensitive airbrush tool. For graphite pens, set the brush dynamics pressure to stylus. For the mouse, lower the brush opacity in the top options bar.Use a large soft edge brush to add or subtract the amount lights, mids and darks in the sketch.
9. To create the grain of graphite you must create a Pattern Fill layer on top of the Color Dodge Layer.
   Click the new adjustment layer icon at the bottom of the Layers palette and select Pattern. Click on the downward arrow of the pattern preview window box; Select the flyout triangle (inside of the circle on the upper right) from the drop down palette and load or select Patterns2.pat.You are looking for the Stucco pattern. You may want to view the patterns with a “list” so change this option for viewing under the pattern flyout triangle, as well.
10. Once you select the Stucco pattern, your screen will look grainy and gray. In the Layers palette change the blending mode for the pattern fill layer to Overlay and adjust opacity if necessary.
11. You can change the scale of the pattern if needed, just double clicking on the pattern thumbnail on the layer.The pattern fill box will open and you can slide the scale up or down, experiment by choosing other patterns, it’s editable.
12. Now your image should look like a drawing.

thanks to Shan Canfield at www.shanzcan.com

Well I found also another site that could turn color photo into pencil sketch too, here is the site: http://www.dumpr.net/sketch.php but the result is poor.

posted by John Gunawan W
creativeclan.net