The special, hosted by Thomas Rhett and Lauren Akins, will air on November 30 on ABC.
Kelsea Ballerini, Dave Mathews, Finneas and many more are also performing for the event which runs across October 16-18 on YouTube.
The surprise news was presented to Watson during a performance at the Opry, which he first played in the mid-1960s.
A tribute to the famed Nashville institution that's as old as what we call country music itself.
The country superstar has also launched a contest inviting fans to win the chance to perform the rap from 'The Champion' on the tour.
uDiscover reviews the 2018 Country to Country (C2C) Festival, which starred Kacey Musgraves, Little Big Town, Faith Hill & Tim McGraw and many more.
Country music icon Keith Urban has announced details of an extensive world tour for 2018 and a new album, both named Graffiti U
Carly Pearce has become only the third female in nearly 12 years to hit No. 1 on Billboard's Country Airplay with a debut single, 'Every Little Thing.'
Breakthrough country artist Brett Young completed a debut run of shows in the UK and Ireland last week on Lady Antebellum's You Look Good tour,
The Grand Ole Opry has announced the launch of eight new digital series, to debut on the Opry's YouTube channel during August 2017.
2015 was a year of landmarks and exciting happenings in country music, celebrated in uDiscover's latest 20 Songs playlist.