The Welsh club defeated League Two Bradford City 5-0 with a history-making scoreline to take out their first major trophy and centre-back Williams was absolutely thrilled to be a part of such a victory.
"This is what we all dreamed of as little boys. It's a dream come true winning the final at Wembley," he told Sky Sports 1.
"We had a job to do and did it brilliantly. We knew there was a danger as they have beaten Premier League teams, but we had a job to do.
"The boys were really professional and we carried on playing all the way."