Onder andere met: Hringur Ingvarsson (Young Grendel), Spencer Wilding (Grendel`s Father), Stellan Skarsgård (Hrothgar), Ingvar Eggert Sigurðsson (Grendel), Gunnar Eyjólfsson (Aeschere), Gerard Butler (Beowulf), Philip Whitchurch (Fisherman), Ronan Vibert (Thorkel), Rory McCann (Breca), Tony Curran (Hondscioh), Martin Delaney (Thorfinn), Mark Lewis (King Hygelac), Elva Ósk Ólafsdóttir (Sea Hag), Ólafur Darri Ólafsson (Unferth), Steinunn Ólína Þorsteinsdóttir (Wealtheow), Sarah Polley (Selma), Eddie Marsan (Father Brendan), Gísli Örn Garðarsson (Erik), Gunnar Hansson (Grimur)