Glenn Frey, a member of the legendary rock group The Eagles, died Monday after a long illness, the band's publicist confirmed.

"Glenn fought a courageous battle for the past several weeks but, sadly, succumbed to complications from rheumatoid arthritis, acute ulcerative colitis and pneumonia," a post says on the band's official website.

Frey's illness forced the Eagles to postpone their inclusion in the 2015 Kennedy Center Honors.

The band was originally formed as a backup group for singer Linda Ronstadt in the early '70s. Their first album was released in 1972, launching a new sound in music which blended country and rock.

Later albums included Hotel California and One of These Nights. Personal and musical differences led to to the band's breakup in 1980, which led to each member launching their own respective solo careers.

Frey's solo hits include The Heat Is On and You Belong to the City, which was featured on the television series Miami Vice.

The band reunited in 1994 for a tour and an album, both titled Hell Freezes Over. One of the group's last performances was a show in Bossier City in 2015.

"He was like a brother to me," said former bandmate Don Henley. "We were family, and like most families, there was some dysfunction. But, the bond we forged 45 years ago was never broken, even during the 14 years that the Eagles were dissolved."