•
Matthew Modine as Jack Robinson, the fifteenth generation descendant of the original Jack. Unlike his ancestor, this Jack is a good and honest man. •
Mia Sara as Ondine, a woman who was taken in by Thunderdell and raised as his own child after losing her parents to disease. A kind and loving young woman, Ondine's heart became hard and her demeanor sour after the original Jack betrayed her and broke her heart. •
Vanessa Redgrave as Countess Wilhelmina, the original Jack's mother and Thunderdell's actual murderer. Unlike the rest of her family, Wilhelmina was cursed for her crimes by becoming immortal, never aging one day, only to see all her descendants die before their time, claimed by the Robinson Curse, and her family wither away. •
JJ Feild as original Jack Robinson, a young con-man in poverty who was chosen at random by Magog in the hopes that he would unite the two worlds. Instead he gives into greed, steals the harp and goose of prosperity and becomes complacent in the murder of Thunderdell, thus beginning the Robinson curse despite gaining wealth. •
Daryl Hannah as Thespee, a giantess once worshiped as a goddess by the Norse people. A beautiful woman with pale skin and blonde hair, Thespee is the kindest and most reasonable of the giants' council. •
Jon Voight as Sigfriend "Siggy" Mannheim, Jack's unscrupulous second-in-command in his business dealings. The model of a corrupt businessman, all Siggy cares about is making money and gaining power. •
Anton Lesser as Vidas Merlinis, a research scientist for Jack Robinson's family business. Vidas had a strong desire to see an appropriate amount of the Robinson fortune used for the noble effort to stop world hunger. Instead, after the disappearance of Jack, Mannheim employs Vidas to manage the production of golden eggs. In the end, Vidas tells the media that the Robinson fortune would be spent to help feed the starving nations of the world. •
Richard Attenborough as
Magog, the wisest and most ancient of all giants. Magog is the leader of their council. •
Bill Barretta as
Thunderdell, the original guardian of the Harp of Harmony and the Goose of Prosperity. Radically different from most of his portrayals in fairy tales, Thunderdell was a very kind-hearted giant. •
Jim Carter as
Odin, a one-eyed giant with blue hair who was worshiped by the
Vikings as the king of their gods. Hot-tempered and accusatory, Odin shows no remorse towards judging Jack based on crimes committed by an ancestor who has been dead for almost 400 years. •
James Corden as Bran, Thunderdell's son and Ondine's best friend. Bran tried to save his father from falling to his death, but failed; a guilt that has haunted him ever since. •
Jonathan Hyde as Dussan, Jack's
butler and
aide-de-camp. • Nicholas Beveney as
Cernos, a dark-skinned giant with the head of a stag. Cernos was worshiped as the god of forests by the ancient Celtic people of western Europe. Cernos watches over the plants and animals of the giants' world. His anger at Jack is great, for it is the wildlife of his world that has suffered most from the loss of Galaga and Harmonia. •
Roger Blake as
Thor, Odin's son. A large, heavily muscled giant with a bushy red beard who wields a huge hammer called Mjolnir as a weapon. He was worshiped by the Vikings as their god of storms. • Hon Ping Tang as
Mahacalla, a blue-skinned giant with four arms. Mahacalla is still worshiped to this day by the Hindu peoples of the Indian subcontinent. • Denise Worme as Nimna, a solidly built, dark-skinned giantess who wears her hair in long dreadlocks. Nimna is worshipped as a goddess of fertility and childbirth by many tribes in central Africa. •
Mak Wilson – Galaga (performer) •
Brian Henson – Galaga (voice) ==Origin==