After nearly three decades of dating, Gene Simmons and Shannon Tweed have finally set a date to wed, Oct. 1, which will be aired afterwards on their reality television show.

Simmons asked Tweed to marry him during the season finale of the pair's A&E reality television show Gene Simmons Family Jewels.

Tweed wrote on her Twitter account that the marriage proposal was the most shocking moment she's ever experienced.

The KISS front man and former Playboy model will marry at the posh Beverly Hills Hotel in Oct. They asked that all guests wear classy cocktail attire...although we know some Rockstar attire will be worn.

The invitation was signed: Love, soon-to-be Team Tweed-Simmons.

The longtime couple has two children together, 22-year-old Nick and 19-year-old Sophie, who wrote a letter reflecting on their parent's marriage decision included in the invitation.

After 28 years of two loose strings, our parents have finally decided to tie the knot, reported the Hollywood Reporter. Our Mother will share our horrendous hyphenate of a last name and our Father's life... well it doesn't change much.

According to People, Simmons and Tweed have been having problems recently, after Simmons claimed he has slept with other women during their 28 year relationship. However the couple, undergoing therapy, appears to be doing well in the wake of the marriage proposal.

Last day of couples retreat/therapy today. Good work going on here :), Tweed tweeted on Thursday.

The next season of Gene Simmons Family Jewels will air Oct. 4, three days after the couple weds, featuring the wedding planning process.

Here is a look back at the 28 year relationship between Gene Simmons and Shannon Tweed.

Simmons of Kiss and Tweed arrive at the Blu-ray disc launch party for the 1983 classic film quotScarfacequot in Los Angeles
Simmons of Kiss and Tweed arrive at the Blu-ray disc launch party for the 1983 classic film "Scarface" in Los Angeles Reuters
Gene Simmons and Shannon Tweed wedding invatation.
Gene Simmons and Shannon Tweed wedding invatation. Gene Simmons/Shannon Tweed
gene simmons tweed wedding invitation
Gene Simmons and Shannon Tweed wedding invatation. Gene Simmons/Shannon Tweed
gene simmons shannon tweed
Rock musician Gene Simmons of the group "KISS" arrives with actress Shannon Tweed as guests for the premiere of the new film "Event Horizon" August 12, 1997 in Beverly Hills. REUTERS
Gene Simmons of the rock group quotKISSquot and Shannon Tweed arrive as guests for the premiere of the new action drama film quotSwordfishquot in Los Angeles June 4, 2001.
Gene Simmons of the rock group "KISS" and Shannon Tweed arrive as guests for the premiere of the new action drama film "Swordfish" in Los Angeles June 4, 2001. REUTERS
Gene Simmons of the rock group quotKISSquot poses with his family, companion Shannon Tweed L and their children Nicholas and Sophie as they arrive as guests for the premiere of the new comedy film quotThe New Guyquot in Hollywood, May 7, 2002.
Gene Simmons of the rock group "KISS" poses with his family, companion Shannon Tweed (L) and their children Nicholas and Sophie as they arrive as guests for the premiere of the new comedy film "The New Guy" in Hollywood, May 7, 2002. REUTERS
U.S. actress Shannon Tweed and husband U.S. rock musician Gene Simmons arrive for the premiere of quotRizequot at the Egyptian Theatre in Hollywood June 21, 2005
U.S. actress Shannon Tweed and husband U.S. rock musician Gene Simmons arrive for the premiere of "Rize" at the Egyptian Theatre in Hollywood June 21, 2005. REUTERS
Music recording artist Gene Simmons R poses with his long time partner Shannon Tweed 2nd-L and their two children, Nicholas and Sophie, at the AE networks up-front presentation at the Geffen Playhouse in Los Angeles May 5, 2006.
Music recording artist Gene Simmons (R) poses with his long time partner Shannon Tweed (2nd-L) and their two children, Nicholas and Sophie, at the A&E networks up-front presentation at the Geffen Playhouse in Los Angeles May 5, 2006. REUTERS
Rock star Gene Simmons of the band quotKISSquot L and partner of 23 years former Playboy Playmate Shannon Tweed of the new AE network reality series quotGene Simmons Family Jewelsquot, speak during a panel discussion at the Cable Television Cri
Rock star Gene Simmons of the band "KISS" (L) and partner of 23 years former Playboy Playmate Shannon Tweed of the new A&E network reality series "Gene Simmons Family Jewels", speak during a panel discussion at the Cable Television Critics Association press tour in Pasadena, California July 13, 2006. REUTERS
KISS bassist Simmons and actress Tweed arrive at 2007 American Music Awards in Los Angeles
KISS bassist Gene Simmons and actress Shannon Tweed arrive at the 2007 American Music Awards in Los Angeles, California November 18, 2007. REUTERS
Rock Star Gene Simmons L accompanied his partner Shannon Tweed R and son Nick arrive in Vancouver, British Columbia December 29, 2008. The family were heading to the ski resort of Whistler.
Rock Star Gene Simmons (L) accompanied his partner Shannon Tweed (R) and son Nick arrive in Vancouver, British Columbia December 29, 2008. The family were heading to the ski resort of Whistler. REUTERS
Gene Simmons at the premiere of the film quotExtractquot in Hollywood
Gene Simmons, star of the film "Extract", gestures as he poses at the film's premiere with his partner Shannon Tweed (R), their daughter Sophie Simmons (2nd L) and son Nick Tweed-Simmons (L) in Hollywood, California August 24, 2009. REUTERS
Gene Simmons of the band Kiss and his common-law spouse Shannon Tweed 2nd R along with their children Sophie and Nick R stand on the sidelines before the the CFL football game between the BC Lions and Hamilton Tiger-Cats in Vancouver, British Columbia
Gene Simmons of the band Kiss and his common-law spouse Shannon Tweed (2nd R) along with their children Sophie and Nick (R) stand on the sidelines before the the CFL football game between the BC Lions and Hamilton Tiger-Cats in Vancouver, British Columbia July 22, 2011. REUTERS
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