HP first announced its partnership with Humphries, an acclaimed artist as well as stage personality, in December.
Humphries told Revolution: "I always wanted to be a painter and now I am one. I'm no Rembrandt or Van Gogh, but I possess a healthy vanity, and enjoy looking at my own pictures more than anyone else's.
"I have always believed in audience participation in the theatre. This is the first experiment in art participation - inviting the public to improve upon my humble efforts," he added.
Consumers are invited to create personalised works of art, interacting with an existing picture created by Barry Humphries, and one by his alter ego, Dame Edna Everage.
Humphries has created a landscape image - ‘London on Sea' - merging his two favourite locations, Australian beaches and the London metropolis. Dame Edna, meanwhile, has painted a ‘flattering' self portrait, offering users the chance to change her appearance and renowned glasses.
Users can download and print their artwork, after selecting a border, mounting, framing and signing the piece.
"From the public's perspective, I hope the project will be enjoyable. They also get a free picture at the end of it," said Humphries.
'What Do You Have to Say' was launched in August 2007 by Gwen Stefani, with the aim of promoting consumer engagement and interaction with the HP brand by giving them the tools to express themselves online.
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