Reduce Grey Space around Images in a Figure

I have two images that I want to display side-by-side, but the amount of grey space is large making the images small. How can I reduce the amount of grey space around the images to show more of the images. Below is how I am displaying the images.

subplot(121);
imshow(my_image);
subplot(122);
imshow(my_image2);

Answer 1

[Sonoma Rich]

I found this to work better.

     d=0.02; %distance between images
     moon = imread('moon.tif');
     s1=subplot(121);
     imshow(moon);
     s2=subplot(122);
     imshow(moon);
     set(s1,'position',[d 0 0.5-2*d 1])
     set(s2,'position',[0.5+d 0 0.5-2*d 1])

[AnnaA]

This is incredible--thank you!

Answer 2

[Paulo Silva]

   d=0.05; %distance between images
   moon = imread('moon.tif');
   s1=subplot(121);
   imshow(moon);
   s2=subplot(122);
   imshow(moon);
   g1=get(s1,'position');
   set(s1,'position',[0 0 0.5 1])
   g2=get(s2,'position');
   set(s2,'position',[g1(1)+g1(3)+d 0 0.5 1])