A FACEBOOK campaign has convinced British actor, comedian, television star and avid tweeter Stephen Fry to perform in Melbourne next month.

Fry, 52, the popular host of quiz show QI (Quite Interesting), which screens on ABC1 on Tuesday nights, had planned to do just two (sold-out) shows at the Sydney Opera House on July 27 and 28.

But the campaign ''Dear Stephen Fry please come to Melbourne in July, not just Sydney'', which attracted 1306 members, helped change his mind.

Fry announced on his Twitter account on Friday he would perform his show, in which he discusses travel, art, TV, the internet and Twitter, at Melbourne's Regent Theatre on July 31. Tickets will go on sale at 9am on Thursday through Ticketmaster.

Fry tweeted: ''Well, thanks to all those Melburnians (http://bit.ly/9pFqM0) who were kind enough to want me there. I will be coming! Details soon.''