Naomi Watts attended "The Impossible" U.K. premiere in London, England, on Monday night, and she looked incredible in a black Tom Ford dress that showed some skin in the back. The knee-length gown also had giant draping sleeves.

The film is set during the 2004 Thailand tsunami and is inspired by actual events. It centers on Henry (Ewan McGregor), his wife Maria (Naomi Watts), and their three sons as they face one of the worst natural disasters in modern history. "The Impossible" hits theaters on Dec. 21.

Watts also stars in the upcoming film "Diana" about Diana, Princess of Wales and her romantic relationship with Dr. Hasnat Khan. It opens in theaters next year.

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