Keira Knightley has climbed onboard the sci-fi thriller Never Let Me Go for Fox Searchlight, joining Andrew Garfield and Carey Mulligan.

According to Variety, Mark Romanek (One Hour Photo) will direct the cloning-themed pic.

The story revolves around a trio who grew up in a boarding school with no contact or knowledge of the outside world until they discover they are clones grown for the sole purpose of organ donation.

Andrew Macdonald and Allon Reich are producing through their London-based DNA Films banner. Alex Garland, who penned the screenplay, is producing as well. Film 4 is also involved as a producer.

The film is set to lense in April in London and Norfolk, England.