The 26-year-old Reds midfielder is a much-loved figure in the Dragons setup and according to Swansea City defender Williams, is an extremely important member of Chris Coleman's playing group.
"Everyone loves Joe," he said.
"Great beard, great haircut, great guy, he's the main man in the squad. Class player too.
"But he is one of our best players, without a doubt. I remember when we played in the Olympics together he was unbelievable on the back of a great season with Swansea.