Keith Urban’s big little lyric change is going viral after his and Nicole Kidman’s split.

Prior to the country singer’s divorce from his wife of 19 years, Urban performed “The Fighter” — which was inspired by his and Kidman’s early days together.

However, the Grammy winner, 57, recently tweaked one of the lines to reference his utility player, Maggie Baugh, during a show.

Instead of singing, “When they’re tryna get to you, baby I’ll be the fighter,” Urban changed it to, “When they’re tryna get to you, Maggie I’ll be your guitar player.”

Notably, the musician told fans in 2017 that he wrote the song “very quick[ly]” because he “literally just thought about Nic … and [their] relationship at the beginning and some of the things [they’d] said.”

Baugh, 25, shared a clip of the moment via Instagram on Saturday, captioned, “Did he just say that👀.”

Social media users blasted the footage, with one writing that Kidman “deserves better” and another insisting the lyric change lacked “class.”

A third labeled the social media upload “things that make you go ‘hmmm,’” while some questioned Baugh’s decision to post it “in the first place.”

Reps for Urban and Baugh did not immediately respond to Page Six’s requests for comment.

Two days after the video was shared, news broke that Urban and Kidman called it quits in June and have been living in separate homes.

The Oscar winner filed for divorce Tuesday.

The “Big Little Lies” star “did not want the separation and was trying to save things,” a source told Page Six on Monday.

Kidman and Urban, who wed in June 2006 and share daughters Sunday Rose, 17, and Faith Margaret, 14, have yet to publicly comment on their bombshell breakup.

TMZ reported Tuesday that rumors are swirling “all over Nashville” that Urban has moved on “with another woman.”

The outlet claimed, “Let’s just say, Nicole doesn’t dispute that, but she’s still shocked over it.”