London Stock Exchange chairman Don Cruikshank, who is also president of the IR Society, announced the initiative at the body's annual conference, held last week at the Royal Lancaster Hotel, London.
The six-strong panel is being launched in the next three weeks, with plans to double the figure to include heads of small to mid-cap companies as well.
Cruikshank told the conference: 'The panel will work with the board and help raise the profile of IR, increase the importance that companies attach to it and champion the case of IR within the corporate community.'
Society director general Andrew Hawkins added: 'We believe that too many companies - often in the FTSE 100 - view IR simply as a means to either sell a company story or as a necessary evil, and we want to change that perception.'
Last week's conference also saw the launch of the UK's first professional IR qualification - the Certificate in IR - which will be overseen by the Examinations Board, chaired by Raghnall Craighead.