Little Lady Ann Blyth
The dresses in The World in His Arms (1952) are by Universal's Bill Thomas, who also did Little Egypt (1951), Playgirl (1954), Magnificent Obsession (1954), Slaughter on Tenth Avenue (1957), The Female Animal (1958), and Touch of Evil (1958). The tiny figure underneath the dresses belongs to 5'2" 34-23 1/2-34 Ann Blyth. What's that, a dress Size Zero or something?
Here's a very nice tribute video:
Her birthday was August 16th. Sorry I'm late.
Happy birthday, Ann.