WikiLeaks founder Julian Assange is hiring a public relations firm after a series of damaging blows to his image.

Mr Assange, who's on bail in the English countryside during his fight to avoid extradition to Sweden over sexual assault allegations, has taken a battering in the media in recent weeks as his personal life is scrutinised.

Wikileaks founder Julian Assange. Credit:Mark Chew

He's appointed London public relations firm Borkowski, owned by master publicist Mark Borkowski - which has a four-member team dealing with media enquiries about him - and an online weekly media conference to deliver messages from him and WikiLeaks.

Mr Assange has also signed a book deal to tell his life story.

AAP