Officials of the Academy will be handing out 50th Anniversary Milestone Awards to seven of the annual prizegiving's biggest winners.

Miranda Lambert, Kenny Chesney, Reba MCEntire and Brooks & Dunn will also pick up the black diamond and white gold trophies designed by celebrity jeweller David Yurman.

The seven honoured artists have set records with wins at the ACMs - Strait has won 21 prizes over four consecutive decades, and duo Brooks & Dunn have raked in the most trophies with 27.

The prizes will be handed out during the 50th annual ACM Awards on 19 April (15).