LOS ANGELES, California (AP) -- Just call him The Duke. Actor Josh Duhamel and his girlfriend, Fergie, are engaged, his publicist said Wednesday. -snip- Duhamel, 35, told Best Life magazine in a recent interview that he's been dating 32-year-old Fergie for about three years and that they have bought a house together. Duhamel is the star of NBC's "Las Vegas," and appeared in the action movie "Transformers." -snip-