Shannon Tweed and Gene Simmons

After nearly 30 years of dating, Kiss bassist Gene Simmons wed longtime girlfriend and Playboy Playmate Shannon Tweed, Us Weekly reports.

More than 400 guests attended Saturday's affair in Beverly Hills, including Hugh Hefner and Bill Maher.

The couple met at a party at the Playboy Mansion and have two children together: Sophie, 19, and Nick, 22.

See other celebs who got married this year

"We've been together 28 years. It's time for me to shit or get off the pot. I know what it feels like not to be with Shannon, and I don't want that feeling again," Simmons told his therapist in an episode of Gene Simmons Family Jewels.

Simmons, 62, proposed to the Tweed, 54, in Belize with a 24-carat diamond.

The proposal was featured on the finale of Family Jewels aired in July. Check out the episode called "Belize It Or Not"