Beautiful poster

Nice choice of images. Composition is OK.

Some suggestions:
The effect of the filter is not equal in the different parts of the image. Try to make the contrast and sharpness of alle parts in the image roughly equal. If some of the backgroundparts are sharper, or contain a lot more detail than the foreground objects, than you can blur these parts.
I should also have made a color correction on the background to a warmer color.
Instead of applying a filter to the whole image i would have added a layer with noise or grain (with multiply of screen mode).