US Actress Kate Bosworth is officially off the market.

The 29-year-old beauty - who used to date actors Orlando Bloom and Alexander Skarsgard - let slip that she's engaged to US film-maker Michael Polish, 41, in a blog post for Vogue magazine.

She was writing about their relationship status while describing a recent trip to South Korea.

She wrote: "On our first day in Seoul, my fiance, Michael Polish, and I venture out to discover Changdeokgung Palace."

The couple have been dating for just over a year after meeting and falling in love on the set of Big Sur, which Polish directed.

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