Exeter will host FC United of Manchester and Millwall in pre-season friendlies this summer.
FC United, formed in 2005 as a breakaway club by disillusioned Manchester United fans following the controversial takeover at Old Trafford by the Glazer family, will visit St James Park on July 21. It will be the first meeting between the two clubs.
Championship side Millwall are the opponents two weeks later on August 4.
The Lions last visited in November 2009, when a late Adam Stansfield goal earned Exeter a point in League One.