Saoirse Ronan and Kit Harington are being considered for 'Fantastic Four'.

The rising Hollywood stars are among a select group of young ingénues being eyed to lead the cast for 20th Century Fox's reboot of the classic superhero franchise, Variety reports.

'Game of Thrones' hunk Harington - who plays Jon Snow in the hit HBO fantasy drama - is auditioning for the lead role of Reed Richards, aka Mr. Fantastic, while fellow Brit actor Jack O'Connell and Miles Teller will also be offered the opportunity to read for the role.

As for the female lead, 'How I Live Now' actress Ronan is among a group that also includes Kate Mara and Australian beauty Margot Robbie for the role of Sue Storm, aka the Invisible Woman.

Earlier this year, it was reported that director Josh Trank has tapped Michael B. Jordan, who starred in his hit sci-fi film 'Chronicle', for the role of Johnny Storm, aka The Human Torch. The 'Fruitvale Station' star remains the sole actor considered for the role.

At this time it's not yet known who will be seen for the part of Ben Grimm, aka The Thing.

Screenwriter Simon Kinberg was recently hired to rewrite the film's script.

'Fantastic Four' will hit cinemas in July 2015.