Rudd, Gillard unite on republic in tweets

Former Labor prime ministers Julia Gillard and Kevin Rudd have put their differences aside to back the campaign for a republic.

Julia Gillard and Kevin Rudd have exchanged tweets in support of an Australian republic. (AAP)

Julia Gillard and Kevin Rudd have exchanged tweets in support of an Australian republic.

Julia Gillard tweeted "Proud to stand w/ @Peter_Fitz & his call for new members to join the Republican cause."

Kevin Rudd responded: "Much I disagree on with Julia Gillard. But not this. Time to join @AusRepublic."