Anne Hathaway and Michelle Williams are among twenty celebrities who will take part in Letters to Jackie, to mark the 50th anniversary of JFK's death.
The TLC network is making a movie about some of the 800,000 condolence letters that were sent to the widow of former President John F Kennedy after his 1963 assassination.
The film revisits the aftermath of the assassination to examine the former first lady's role in helping the nation through its grief as she suffered through her own.
Oscar-winner Anne, Michelle, Zooey Deschanel, Kirsten Dunst, Mark Ruffalo and Betty White are among the stars who will read the letters on the documentary.
The 50th anniversary of Kennedy's killing falls on November 22 2013.