Australian-born Assange, 40, became a worldwide celebrity and infuriated the US government in 2010 when WikiLeaks released secret video footage and thousands of US diplomatic cables about the wars in Iraq and Afghanistan.     

Since then, the scoops have dried up and WikiLeaks has faded from the news headlines, starved of cash by major credit card companies that are refusing to process online donations to it, and bogged down by Assange’s protracted legal troubles.     

A charismatic but temperamental figure, Assange was detained in Britain in December 2010 on a European arrest warrant issued by a Swedish prosecutor after two female former WikiLeaks volunteers accused him of sexual assault.     

His lawyers argue that the warrant is invalid because it was issued by a prosecutor rather than a neutral judge or court.     

If the Supreme Court rejects the argument, he may take his case to the European Court of Human Rights but it is unclear whether that would stop his extradition to Sweden.     

The Supreme Court hearings will last two days and the court is expected to announce its decision some weeks later.     

Assange on The Simpsons         

Assange denies any wrongdoing and has said that the sex accusations, which surfaced at the height of the international furore over WikiLeaks, were an attempt to silence him.     

He is convinced that US authorities are looking for a way to go after him in retaliation for WikiLeaks’ revelations.     

Washington is divided over Assange, with some officials calling for tough action against him to deter would-be leakers and others saying a prosecution would be legally problematic and would give him a boost when he appears headed for irrelevance.

Bradley Manning, a US army intelligence analyst suspected of passing thousands of classified documents to WikiLeaks, is facing a court-martial on 22 charges including aiding the enemy and wrongfully causing intelligence to be published online.      

Meanwhile, Assange has been holed up under house arrest for over a year, mostly at the English country mansion of a wealthy supporter.     

He has made some unexpected career moves, including a guest appearance in an episode of the satirical US animated series “The Simpsons” due to be aired on Feb. 19.     

In another TV first, Kremlin-funded station Russia Today announced last week that it had hired Assange to host a political talk show called “The World Tomorrow”.