How to blur the background behind a static mesh?

You guys must have seen the blurry background in GTA 5 that shows up when you focus at one object.
I want to do the same thing in Unreal Engine. I have been looking for this in the Internet for a month.
Is this even possible?

Thanks!

It is called Depth of Field. You can read about it here.

Thanks! that worked! You are awesome.