The Owls will welcome Spanish La Liga side RCD Espanyol de Barcelona to Hillsborough for the final pre-season friendly for the coming season.
Espanyol are four-time Copa del Rey winners, their latest honour being in the 2005/06 season; they also finished seventh in the La Liga last season.
Wednesday are no stranger to La Liga sides, most recently welcoming Villarreal to S6 for a warm-up match for the 18/19 pre-season. The Spanish outfit left Sheffield with a 3-1 victory.
The Spanish side will visit Hillsborough on July 28th for a 3.00pm kick-off; this will be the only pre-season friendly held at Hillsborough.
In the meantime, the Owls will face Lincoln City, Stocksbridge, and Northampton Town, before flying to Germany where they will visit VfB Lubeck & Holstein Kiel.
Ticket details for the home-tie are yet to be released.