Celebrity Gene Simmons & Shannon Tweed's Wedding Invitation The longtime couple will tie the knot on Oct. 1 – rock star attire expected By People Staff Published on September 1, 2011 08:00 PM Share Tweet Pin Email Photo: Courtesy Gene Simmons and Shannon Tweed We’ve had the royal wedding. Now get ready for the wedding for rock royalty. KISS bassist Gene Simmons, 61, and his decades-long girlfriend Shannon Tweed, 54, have overcome their recent differences and decided to finally tie the knot on Oct. 1 in Beverly Hills. The early evening nuptials – as shown on the two-part invite – will take place at the iconic Beverly Hills Hotel. The invite requests “classy cocktail attire” even though “we know some Rockstar attire will be worn.” The invitations were given a personal touch by their kids Nick and Sophie Tweed-Simmons, including a special message announcing Team Tweed-Simmons with a stenciled portrait of the family drawn by Nick and a poem by Sophie.