The ‘walk' will be launched by Wales's first minister Rhodri Morgan and Big Brother runner-up Glyn Wise this Friday. It will officially open next autumn.
Welsh stars of stage, sport and screen will be shortlisted by a panel before a public vote decides whose handprints will be captured for posterity.
‘We have been briefed to run a full-scale campaign to raise awareness of the attraction, to drive nominations and votes and to secure additional sponsorship,' said Freshwater associate director Alex Love.
The agency won the brief after a head-to-head battle against a rival undisclosed Welsh agency.