Britney Spears shares two adult sons with her ex-husband, Kevin Federline: Sean Preston, 19, and Jayden James, 18.

The Bozeman-based actor is playing the legendary Lakota leader in History's two-part series "Sitting Bull," premiering Tuesday and Wednesday. For him, the connection was more than worth the challenge.

Stay up to date with Frank Spears (South African, 1906 - 1991) . Discover works for sale, auction results, market data, news and exhibitions on MutualArt.

Stay up to date with William A. Breakspeare (British, 1855 - 1914) . Discover works for sale, auction results, market data, news and exhibitions on MutualArt.