Assange challenged the Hezbollah leader about the Syrian bloody crackdown on civilians. (screengrab)

Hezbollah contacted the Syrian opposition to encourage them to start a dialogue with Assad's regime, but they refused, Hezbollah leader Sayyid Nasrallah said in an exclusive interview with Wikileaks leader Julian Assange.

During his debut on the talk show "The World Tomorrow" on RT, a Russian-based English-language satellite channel, Assange challenged the Hezbollah leader about Syria's bloody crackdown on civilians.

"This is the first time I say this - We contacted [...] the opposition to encourage them and to facilitate the process of dialogue with the regime, but they rejected dialogue," Nasrallah revealed in his first interview in six years. "Right from the beginning we have had a regime that is willing to undergo reforms and prepared for dialogue. On the other side you have an opposition which is not prepared for dialogue and it is not prepared to accept reforms. All it wants is to bring down the regime. This is a problem."

The Hezbollah leader also attacked Israel, dubbed as "an illegal state, established on the basis of occupying the lands of others". "If I occupy your house by force it doesn't become mine in 50 or 100 years," he said.

"Hezbollah doesn't want to kill anyone," he continued. "We want justice to be restored. The only solution is the establishment of one Palestinian land where Muslims, Jewish and Christians live in peace."

Assange presents the show from the country estate in Britain where he is under house arrest while waiting for the verdict on his extradition to Sweden. Britain's Supreme Court is expected to decide whether Assange should be sent to Sweden to face allegations of rape and sexual assault.

"Being under house arrest for so long, it's nice to have an occasional visitor and to learn more about the world," he said in a preview for the show posted on RT's website.

The WikiLeaks website for "The World Tomorrow" says there will be 12 shows in total, each featuring a 26-minute edited interview.