The director, who used to be a regular at the festival, was declared unwelcome at the festival following his controversial comments about Hitler during the 2011 press conference of "Melancholia".
Fremaux said Cannes President Pierre Lesucure has really worked over the past few days to "remove this persona non grata" status which von Trier received seven years ago, "thinking that it's maybe time to give him a spot again as a filmmaker".
The festival head said, "There will maybe be an announcement" on von Trier's inclusion in the lineup, which was announced recently.
When asked whether he would not like to make an announcement during the interview, Fremaux said, "Well I sort of just did a little."
The festival director had hinted during the lineup announcement that there would more additions in the coming weeks.
Von Trier's new movie "The House That Jack Built", starring Matt Dillon, Riley Keough, Bruno Ganz and Uma Thurman, is set in Washington State and covers the life and crimes of a serial killer over a 12-year period.
The festival will run from May 8 to May 19.
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