Spain's Kevin Williams Associates (KWA) has picked up international rights on Oliver Stone's Fidel Castro documentary Comandante.

Sales were previously handled by MediaPro, one of the film's co-producers alongside Spain's Pentagrama Films and Morena Films. The controversial title, which paints an amicable, grandfatherly portrait of the Cuban leader, premiered at last year's Sundance and screened in Berlin.

"The fact that this is Oliver Stone and a contentious subject matter could make it more commercial in some territories and taboo in others," Williams says.

Indeed, HBO cancelled its planned broadcast date last May following crackdowns on dissidents by the Castro government, and the Tribeca Film Festival pulled it from its line-up.

Comandante has already sold to the UK (Optimum), Italy (Mikado), Scandinavia and Baltic Countries (NonStop) and pay TV for the US (HBO).

It is a high profile addition to KWA's Mifed slate, which also includes Paz Vega-starrer Carmen, San Sebastian screener The End Of The Night (El Final De La Noche), Juan Luis Iborra's Valentin and Latin American-Spanish co-production Viva Zapato.