Moody Blues singer and bassist John Lodge has died at the age of 82.

On Friday, the family of the long-standing member of the British rock band announced his passing.

In a statement, his loved ones described his death as "unexpected". The cause of death was not revealed.

"It is with the deepest sadness that we have to announce that John Lodge, our darling husband, father, grandfather, father-in-law and brother, has been suddenly and unexpectedly taken from us," they wrote. "John peacefully slipped away surrounded by his loved ones and the sounds of the Everly Brothers and Buddy Holly."

The musician's family continued, "We will forever miss his love, smile, kindness and his absolute and never-ending support."

The statement concluded with a touching nod to how Lodge would end every show.

"We are heartbroken, but will walk forwards into peace surrounded by the love he had for each of us," they shared. "As John would always say at the end of the show, thank you for keeping the faith."

Lodge was best known for co-writing and performing many of the Moody Blues' classic hits, including 1972's I'm Just a Singer (in a Rock and Roll Band) and 1968's Ride My See-Saw.

He played a key role in shaping the band's sound, contributing to their landmark albums, including 1967's Days of Future Passed - widely regarded as one of rock's first concept albums - and 1968's In Search of the Lost Chord.

During his five-decade career with the group, Lodge appeared on 15 of their 16 studio albums, continuing to tour until the band's retirement in 2018.

He is survived by his wife Kirsten, whom he married in 1968, and their two children, Emily and Kristian.