Security on the set of Desperate Housewives has been stepped up after Eva Longoria found two strangers in her trailer.

The star was stunned to find two women using the restroom in her trailer after returning to her home from home during a break in filming last week.

The mystery ladies explained they had wandered off from a studio tour at Universal and needed a bathroom break, so they used the actress's loo after finding her trailer unlocked.

According to U.S. magazine the Globe, Eva confronted security on the lot and was told the minders had mistaken the two tourists as extras on the show.