Exclusive: Inside the Gene Simmons KISS Wedding

Legendary KISS rocker Gene Simmons finally said the two words he vowed he'd never say, and ET was exclusively invited to his weekend wedding to longtime love Shannon Tweed. Watch the video!

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No KISS costume for the groom -- instead, he wore a classic tux and silver tie, while Shannon was glowing in her Priscilla of Boston gown, carrying a bouquet of ivory roses in the beautiful gardens of the Beverly Hills Hotel.

MORE: First Look: Gene Simmons' Wedding Invitation

The happy couple made it official after 28 years together, and it was all captured for their A&E reality series Gene Simmons Family Jewels. The new season begins tomorrow, with the rock 'n' roll wedding airing October 18.

Among the 300 guests attending, celebrity guests including Bill Maher, Hugh Hefner, Survivor creator Mark Burnett, and Dog the Bounty Hunter were among the stars witnessing the nuptials.

Oh, and those two words? "I Do," of course!