Swedish climate activist Greta Thunberg and Game of Thrones actor Liam Cunningham will join the next sailing of the Freedom Flotilla Coalition (FFC) as it attempts to break Israel’s months-long blockade of Gaza.

The “Madleen” is due to disembark from Catania, Sicily, on Sunday with a cargo of humanitarian aid and several high-profile activists on board, including Thunberg, European Member of Parliament Rima Hassan and Palestinian-American lawyer Huwaida Arraf.