Divorce documents were filed in Oklahoma, and the couple have been noticeably absent from the public eye together through the last several months.
Shelton and Lambert first met in 2005 at the taping for CMT’s 100 Greatest Duets concert special.
Shelton and his first wife, Kaynette Gern, divorced in 2006 after three years of marriage.
Shelton and Lambert married in her home state of Texas in 2011 during a ceremony attended by close friends and family.
“We’ve said this before,” Shelton later told CMT Hot 20 Countdown. “We’re more miserable apart than we are together, so we just decided to go ahead and get married and make this thing official.”
In interviews, both singers talked about the pressures of their careers.
“Right now, she’s gone you know doing her thing,” he told Hot 20 in 2011. “We’ll get to the point one of these days where we’ll have a more settled-down situation. But for now, we both know that we don’t want to lose each other, and we wanted to protect our relationship. And so we got married and, for now, we are going on with our careers. And it’s not that far off that we’ll settle down and start acting like married people, though.”
“You can’t do everything,” Lambert told Hot 20 in 2014. “You can’t be everywhere, and at some point, enough is enough. You have to realize how important living a life is, you know. Because if you don’t live a life, you don’t have any fuel to go on, you can’t even write songs about anything because you’re working all the time.”
Aside from the joint statement issued through their representatives, Lambert and Shelton have not commented about the divorce on their individual websites and via social media.
For more country music news, tune in to the new episode of CMT Hot 20 Countdown airing Saturday and Sunday (July 25-26) at 9 a.m. ET/PT.