Former GUNS N' ROSES star Matt Sorum is set to wed his longtime girlfriend in Palm Springs, California next month (Oct13), according to reports.

The rocker, who is currently protesting Japan's annual dolphin hunt, plans to tie the knot with Adriane Harper on 12 October (13).

The couple formed the band Diamond Baby in 2010 and enjoyed success with debut single The Last Rockstar, which was released in 2011.