Hollywood actress Keira Knightley takes an emotional journey as she uncovers her family history. Watch all of this on My Grandparents’ War on @channel4 in partnership with MyHeritage! Catch up on All 4! #keiraknightley #MyHeritage #familyhistory #familyresearch #genealogy #channel4 #all4 #mygrandparentswar #keiraknightleyedit