Emma Watson is replacing Scarlett Johansson in the period romance ‘Napoleon and Betsy’. Watson (18) plays a young woman who falls in love with Napoleon when staying at the island of St. Helena. While she just turned 23 last November, Johansson was considered too old to play the role.

Scarlett Johansson is still producing the movie, set for release somewhere in 2009. Watson hopes the shooting can begin in the fall, so there won’t be any scheduling problems with the next Harry Potter (Harry Potter and the Deathly Hallows: Part 1, 2010).