John Kadlecik (born June 28, 1969 in Council Bluffs, Iowa) is an American guitarist. He was a founding member as the lead guitarist for the Grateful Dead tribute band, Dark Star Orchestra, in 1997. From 2009 to 2014 he performed with original Dead members Bob Weir and Phil Lesh in Furthur. Kadlecik lives in Takoma Park, Maryland with his wife, Katy Gaughan, who is a percussionist in the jazz trio, Djesben.