The awards show will mark Shelton and Lambert's first public reunion since their divorce in July. The couple were together for 10 years, and married in May 2011.
Shelton and Lambert will compete for the Musical Event of the Year award. The former is also nominated for Male Vocalist of the Year, while Lambert is up for Female Vocalist of the Year, Entertainer of the Year and Music Video of the Year.
The 2014 CMA Awards will air Nov. 4 at 8 p.m. ET on ABC. Lambert has won Female Vocalist of the Year for the past five consecutive years, and celebrated her most recent nominations by shopping in September.
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