The two-day event climaxes on Saturday July 27 with the traditional lighting of the 40ft Wickerman sculpture as festivalgoers party into the early hours.
Also joining the line-up are critically acclaimed duo Public Service Broadcasting to showcase their mix of archive samples, electronic beats and live audio visual transmissions.
Festival co-ordinator Helen Chalmers said: "Primal Scream are one of Britain's most iconic, inventive and exciting bands and having them play at Wickerman is a major coup, both for the festival and its fans.
"Once again the full line-up will feature an eclectic and sometimes surprising mix of leading artists, alternative acts and exciting emerging talent. So whether its Primal Scream or Public Service Broadcasting stirring up the crowds with sizzling sets, we are certain that Wickerman 2013 will be one of the most relaxed, fun and friendly festivals of the summer."
More artists will be announced in the lead-up to the festival. Tickets for Wickerman went on sale in November and are available online or from selected retail outlets.