The Die Hard actor is selling his Sun Valley mansion, after buying the property in 2001, according to the Idaho Mountain Expres.
The 20-acre property comes complete with guesthouse, gym, six bedrooms, pool and water slides.
Willis has reportedly decided to sell the house because he has been unable to spend enough time in the nearby area.
He is also still hoping to sell The Mint bar and nightclub on Hailey's Main Street, and has now dropped its asking price from $6 million (£3.9m) to just under $4.5 million (£2.9m).
Bruce Willis is currently expecting a child with his second wife Emma Heming.
The action movie star will film a fifth Die Hard movie next year, entitled A Good Day to Die Hard, to be released in 2013.