Open a new document in photoshop 600×445 px.
Find or use an image you already have of a face. I chose this one:
Place it in the photoshop document by copying and pasting. Place it wherever you see fit.
Go to Filter > Pixelate > Color Halftone…
Use the following settings:
Your image will look like this:
Select the ellipse tool from the tools palette.
Use the following settings:
Place an ellipse where you would like a speech bubble.
Right click in the ellipse and select fill path:
Use the following settings:
Select the pen tool from the tools palette.
Draw a triangle to show the origin of where the speech is coming from.
Right click on the layer and choose Blending Options.
Use the following settings:
Fill the background layer with black.
Go to Filter > Pixelate > Color Halftone…
Use the following settings:
Do this 2 times.
Your image will look like this:
Select the Text tool from the tools palette.
Now write whatever text you would like directly over the speech bubble.
_