Eleven federal MPs have joined forces to agitate for the Morrison government to intervene in the United States' attempts to extradite WikiLeaks founder Julian Assange from Britain to stand trial on espionage charges.

Independent MP Andrew Wilkie said the cross-party group, which includes two Nationals MPs, two Labor MPs and members of The Greens and the cross bench, would provide a forum to "discuss matters" relating to Mr Assange returning to Australia.

Independent MP Andrew Wilkie has formed a parliamentary group to attempt to bring Julian Assange to Australia. Credit:Alex Ellinghausen

Mr Assange told a London judge on Monday he was in an inequitable fight against a superpower, which had been spying on his "interior life" and on confidential meetings with his legal team.

Queensland MP George Christensen will co-chair the group along with Mr Wilkie, a long-time supporter of the Australian.