Bang PR works primarily in the entertainment, e-commerce, fashion and telecoms sectors.
In July 2010, the M&C Saatchi Group launched M&C Saatchi PR in London as the group's first PR consultancy.
M&C Saatchi Worldwide chairman Tom Dery said: 'We've been looking to strategically integrate public relations for some time but it has always been about finding the right fit. It's a natural move for PR to complement M&C Saatchi's integrated advertising, digital, design, brand development and sport & entertainment agency offerings.'
Bang's clients include Cadbury, Club Trading & Distribution group, National Australia Bank, Optus, POM Wonderful and Universal Pictures.
Bang PR MD Narelle Craig said: 'It's an exciting time and we're looking forward to working with M&C Saatchi.'