Legal representatives of English journalist Ian Bailey lodged appeal documents at the offices of Cork Circuit Criminal Court yesterday.
Bailey is to appeal Circuit Court Judge Patrick Moran's judgment in his libel case against eight newspapers.
The 47-year-old won damages of €8,000 at Cork Circuit Criminal Court against the Sun newspaper and the Irish Mirror last month.
He lost his action against six other newspapers who he claimed had defamed him during their coverage of the murder of French woman Sophie Toscan Du Plantier.
Ms Toscan Du Plantier was found dead in a laneway at her holiday home near Schull on December 23rd, 1996.
Bailey, who lives in Schull, must pay a bill of more than €200,000 legal costs.
According to legal sources, the appeal will be heard at the Cork sittings of the High Court before the end of the year.