Hey guys first post here

Im renting a duplex and the thing i like about it is the only wall i share with the duplex beside me is about 5' wide and 8' tall and its in the kitchen. I found out shortly after moving in that the wall is paper thin and I can hear the neighbor closing cabinets and sometimes just walking in his kitchen

The problem is i love to watch movies.. LOUD, on my newly completed theater thats in my living room which is right next to the kitchen. Is there any thing i can to to block as much sound as i can from going to the next duplex. I'm currently unemployed so money is very tight id like to do this on the cheap.
Here are some pics of the wall if it helps


tnx guys!