Marketing
Keira Knightley's breasts were enlarged for the US theatrical movie poster. This practice angered Knightley, who says that it "comes from market research that clearly shows that other women refuse to look at famous actresses and stars with small breasts." Later in 2006, Knightley claimed she is "not allowed to be on a magazine cover in the US without at least a C cup because it 'turns people off'."
Read more about this topic: King Arthur (film)