It happened in Germany. Details:
It wasn’t Darth Vader who gave the blessing to the first communion children. This was personally undertaken by Pastor Christoph Nobs with a bright green laser sword at the celebration of a Star Wars First Communion Mass. The idea for the stars-War Communion came from Nicolas Gkotses community director. Star Wars had been a theme for the children in their religious instruction and so he tried to communicate the gospel in this way in a timely manner. – “May the force be with you!”
For those who can translate, here’s the original report in German.