The Millennium was the creation of Curt Boettcher, who gathered a handful of California musicians to create a psychedelic rock group with sunshine pop harmonies. Boettcher was from the folk group the GoldeBriars and later The Ballroom which is where he met Sandy Salisbury. Ron Edgar and Doug Rhodes were from The Music Machine which had scored a Top 20 hit with the song "Talk Talk". Lee Mallory was a singer, songwriter and guitarist that had a hit with the cover of the Phil Ochs song "That's The Way It's Going To Be". It was produced by Boettcher and reached #86 on the charts. Joey Stec and Michael Fennelly were singers, songwriters and guitarists that were recruited by Boettcher.

The Millennium recorded one album, "Begin" in 1968. It was highly influential and had some local success with the song, "To Claudia on Thursday" but was commercially unsuccessful. The album was an interesting combination of breezy pop and psychedelic rock. At the time, it was the most expensive record Columbia had ever produced. The song "It's You" become a substantial hit in several regions and "5 AM" became a hit in the Philippines. Before disbanding, the group recorded one follow-up single: "Just About The Same" b/w "Blight," as well as several tracks that were later released on compilation albums.

Boettcher went on to producing and in 1973 released a solo album, "There's An Innocent Face" but it was a commercial failure. In 1979 he had a moderate hit with a 10-minute disco version of the song "Here Comes the Night" by The Beach Boys. He died in 1987 while being treated for a lung infection.

Lee Mallory performed as lead guitarist and a member of the "Tribe" for the first road company of the stage production of Hair. He is the only person known to have served both in the tribe and in the band. He became highly esteemed in San Francisco and The San Francisco Board of Supervisors proclaimed in 2005 that January 10 would be Lee Mallory Day, honoring Lee and all singer-songwriters. He died of liver cancer in March of 2005.

Joey Stec joined the Blues Magoos and after that started the band, The Dependables, and then released a solo album in 1976. In the late 1990s he founded the record label Sonic Past Music which is dedicated to publishing unreleased recordings by classic rock artists.

Sandy Salisbury recorded a solo album, but it was not released until 2001, he worked several jobs before becoming an author of novels and children's literature (under his given name of Graham Salisbury).

Doug Rhodes did studio work for Taj Mahal, The Association and others. He eventually moved to Canada and is a professional piano tuner and piano restorer, as well as playing 1920's style jazz with an orchestra called The Belevedere Broadcasters.

Ron Edgar did studio work for The Association, Bread, Paul Renze and appears on Boettcher's and Salisbury's solo albums. Michael Fennelly would end up in Crabby Appleton.