The Osmonds, the family singing sensation of the 1970s and '80s, have reunited for the first time in more than 20 years for a 50th anniversary reunion show to air next year.

Six of the brothers and Marie took to a stage in Las Vegas Tuesday in a reunion show that combined old pop hits with their current country sound.

Donny and Marie Osmond laugh during a news conference in Las Vegas to promote the Osmonds' 50th anniversary special.
(Darrin Bush/Associated Press)

Various members of the Osmonds continue to perform, producing about 200 shows a year in various combinations.

But no one could remember the last time they were all together, Wayne Osmond said Tuesday.

Donny, Jimmy, Marie, Merrill, Alan and Jay joined Wayne on stage and the family met with fans and answered questions after the show.

The reunion concert is "a reminder that we're all one big happy family," Merrill Osmond said.

The PBS program, Still, will commemorate the 50th anniversary of the barbershop quartet, the Osmond Brothers, formed in 1957.

The original four performers were Alan, Wayne, Merrill and Jay Osmond, who worked the state fair circuit in Utah until a visit to Disneyland led to a television debut on Disney After Dark in 1962.

The wholesome crew became TV stars in 1960s, appearing on The Andy Williams Show, then moved into pop stardom in the 1970s with a soft rock sound and the addition of brothers Donny and Jimmy.

Donny Osmond and sister Marie had a TV show in the 1990s and went on to further stardom.

Marie Osmond, now 47, said the family's accomplishments and savvy are under-appreciated.

"I don't think they've been honoured or the accolades haven't been what they should be," she said of her brothers.

Wayne, Jay, Jimmy, and sometimes Merrill continue to perform as The Osmond Brothers, with frequent appearances on the country circuit.

Marie has been a radio host and makes and sells dolls.

Donny had a successful solo career then moved into theatre, starring in Joseph and the Amazing Technicolor Dreamcoat and playing Gaston in Beauty and the Beast in tours across North America.

The Osmonds have recorded 142 albums and sold 100 million copies.

They still maintain their squeaky clean image.

"We believe in America and the flag. All of my eight sons were eagle scouts," Alan Osmond said.