Bieber said the singer died in an Alive Hospice facility in Nashville. He had been hospitalized for several days.
Wagoner, an Opry star since 1957 and a Grammy winner, was a member of the Country Music Hall of Fame and won three Country Music Association awards for songs with Parton in the Vocal Duo and Vocal Group categories.
The two recorded 14 Top 10 hits including "Last Thing on My Mind" and "Please Don't Stop Loving Me."
Wagoner's solo hits included "Company's Comin" and the "Green Green Grass of Home" as well as "Carroll County Accident."
A $3 million lawsuit filed by Wagoner claiming Parton owed him money after the duo broke up in 1974 was settled out of court.
Wagoner, who sported a pompadour until he changed his hairstyle to curls, annoyed some Opry performers when he invited Soul Music King James Brown to perform on a stage not regularly graced by black performers.
At the time, Wagoner said he invited Brown to add to the Opry's reputation and "I hope none of the opposition by some members was racial but people have a problem accepting anything that's new."
He was also criticized by some for producing an album by soul artist Joe Simon to which he replied that "that's strange because there is such a similarity between black music and country music."
Active to the last, Wagoner released "Wagonmaster" produced by fellow country music performer Marty Stuart just last June.
Born in Howell County, Missouri, Wagoner grew up on a farm in hardscrabble surroundings, listening on an old battery radio to the Grand Ole Opry every Saturday night.
A high school dropout after his father's health failed, Wagoner began his career on a radio show in Springfield, Missouri, where he met Nudie Cohen, a Brooklyn-born tailor who advised him to don his trademark suits on stage. Cohen went on to design suits for Elvis Presley.
Wagoner sang on Red Foley's "Ozark Jubilee" in Springfield from 1953 to 1957 when he joined the Grand Ole Opry in Nashville. Later he signed with RCA to produce albums.
Parton sang for mentor in his last hours
Oct 30, 2007 4:00 am PDT
Dolly Parton says she feels like a part of her died along with her old duet partner, Porter Wagoner. But Parton says she was grateful that she was able to spend a few final hours with the man who launched her career before he succumbed to...
Country star Porter Wagoner dies at 80
Oct 29, 2007 8:00 am PDT
Porter Wagoner was known for a string of country hits in the '60s, perennial appearances at the Grand Ole Opry in his trademark rhinestone suits, and for launching the career of Dolly Parton. Like many older performers, his star had faded...
Grand Ole Country Great Wagoner Dies
Oct 29, 2007 1:00 am PDT
Porter Wagoner, the rhinestone cowboy who made shiny suits and Dolly Parton fashionable, has succumbed to lung cancer. He was 80. Complications from the disease forced Wagoner into a Nashville hospital earlier this month. He was discharge...
Porter Wagoner moved to hospice care
Oct 26, 2007 3:00 pm PDT
Porter Wagoner, who was recently diagnosed with lung cancer, has been released from the hospital and moved to hospice care on Friday, a spokeswoman for the Grand Ole Opry said. Wagoner, 80, a member of the Grand Ole Opry since 1957, was h...
Porter Wagoner ailing, hospitalized
Oct 19, 2007 5:00 am PDT
Porter Wagoner has been hospitalized with an undisclosed ailment and is in serious condition, his publicist says. Darlene Bieber said the 80-year-old Grand Ole Opry star, known for his trademark rhinestone stage outfits, "is asking for pr...