Country music rocker Brantley Gilbert rushed off the stage in the middle of his concert Friday night to help his pregnant wife deliver their baby on a tour bus during "the craziest night of my life."

Gilbert's wife, Amber, went into labor just as the multiplatinum musician started his set at the Cadence Bank Arena in Tupelo, Miss. during his "Off The Rails Tour."

The "Bottom Up" hitmaker shared a video on Instagram capturing the events of the evening as he was suddenly pulled aside for an "emergency backstage." That's when he found out Amber was about to welcome their third child on their tour bus.

"Last night might have been the craziest night of my life. Watching such an amazing woman do such an amazing thing is something I'll never forget," Gilbert wrote on Instagram.

As the video featured his 2019 ballad "Man That Hung the Moon" -- a song about a father's love for his baby boy -- the singer had an emotional Facetime conversation with his mother.

She asked the singer how he was doing and he responded, "not as good as you are about to be. You got a new grandbaby."

"I got a new grandbaby? I do?" she responded in excitement as the social media video featured black and white images of him holding the newborn.

When his mom asked how Amber was, he responded that she was "a freaking savage" before adding that he was "going to finish the show."

Gilbert rushed back on stage to reveal the news of his family's newest addition to his fans.

"We got a baby!" he exclaimed to a sea of supporters who responded with roaring applause.

"Thank you to our road family for rallying around us, Brittany Thornton for helping us bring this little dude into the world, Tupelo, Mississippi for showing us mad love and support, and most of all... Amber Gilbert, for letting me love you and showing me EXACTLY how incredibly strong a woman can be. I love you."

He also shared the special video on his Instagram stories page with the caption "We've got a new addition to the Gilbert family... God is good."

Country Rebel reports that a midwife was on the bus assisting with the birth.

The newborn's name has not yet been revealed but the child will share a historic birthplace with Elvis Presley, who was also born in Tupelo.

The new baby will have two older siblings, Barrett, 6, and Braylen, 5.

Brantley and Amber Gilbert, the founder of a hybrid homeschool group, met in high school and reconnected years later.

In a 2014 interview on "The Bobby Bones Show," Amber said their relationship was "on and off for a few years" before they got engaged in 2014. They got married in 2015.