Keira Knightley has signed on to join Andrew Garfield and Carey Mulligan in Fox Searchlight's upcoming sci-fi thriller "Never Let Me Go."

According to Variety, the plot centers on three people who grew up in isolation in a boarding school and discover they are clones created only for the purpose of organ donation.

Mark Romanek, whose credits include "One Hour Photo," will direct a script by Alex Garland ("Sunshine").

The trade said the film will head into principal photography in April.

Knightley was last seen in "The Duchess." She has plenty of projetcs coming up, including "Last Night," "London Boulevard" and "King Lear."

Garfield's credits include "Lions for Lambs" and "The Other Boleyn Girl." Mulligan will soon be seen in "Public Enemies" and "Brothers."

Ewan McGregor and Carey Mulligan are in negotiations to star in "The Electric Slide" for Myriad Pictures, according to Variety.

The flick is based on Timothy Ford's article "The Yankee Bandit: The Life and Times of Eddie Dodson, World's Great Bank Robber." Tristan Patterson wrote the screenplay and will direct.

McGregor will star as Dodson, who robbed more than 70 banks in the 1980s before the FBI caught him.

McGregor was last seen in "Deception." He has tons of projects coming up, including "I Love You Philip Morris," "Angels & Demons" and "The Ghost."

As for Mulligan, her credits include "Pride & Prejudice" and "And When Did You Last See Your Father?" She will also be seen in Michael Mann's "Public Enemies" and "Brothers."

"Slide" marks Patterson's directorial debut.