Watford's Under-18s will play Kings Langley as part of their pre-season preparations for the 2014/15 campaign.
Dave Hughes' side will travel to Gaywood Park on Saturday, July 19 to take on the Spartan South Midlands side in a 3pm kick-off.
The match falls on the same day as the first-team friendly at Stevenage.
Tickets are priced at £5 for adults and £1 for concessions with gate reciepts going towards upgrades to Kings Langley's ground.
Earlier in the day, Watford announced a friendly with Boreham Wood for their young professionals and Academy players, scheduled for Tuesday, July 29.