The Garry Marshall directed-film saw Gere in the role of a cold businessman who falls in love with a prostitute played by Roberts.
Marshall is in New York this week to meet with composers, lyricists and directors for an adaptation with producer Paula Wagner, who has been involved with various Broadway productions including 'The Heiress' starring Jessica Chastain, said the Hollywood Reporter.
JF Lawton, who wrote the screenplay for 'Pretty Woman', is co-writing the stage adaptation with Marshall.
Marshall has previously forayed into theatre with the musical version of his sitcom 'Happy Days' and 'The Roast'.