We're told Tweed was wearing $2.5 million of diamonds for the first dance ... and that does NOT include engagement ring. Michael Raven handmade the jewelry -- which included 13 pieces for the bride and bridal party, consisting of earrings necklaces and a $420,000 bracelet.
Gene and Shannon's two kids, Nick and Sophie took part in the ceremony, along with Kiss band-mate Paul Stanley.
Among the nearly 400 guests were Hugh Hefner, as Shannon is a former playmate.
Congrats to the happy couple!!