August 9, 2021 | 4:56pm

Machine Gun Kelly and Travis Barker are blood buddies.

The two inked-up rockers announced a second joint album on Monday, revealing their forthcoming music with matching tattoos.

“We’re back for round two,” MGK, whose real name is Colson Baker, captioned a video showing the forearm tats on Instagram. The design reads “Born With Horns,” the name of the LP.

“Born With Horns” will be Kelly’s sixth studio album, following 2020’s “Tickets to My Downfall,” which was also produced by Barker.

The blond rocker loves to mark his music on his body; he has “Tickets to My Downfall” tattooed on his neck, as well as tributes to his favorite performers including the Red Hot Chili Peppers, Kurt Cobain, Tommy Lee and more.

Barker, 45, is so covered in ink that he has begun layering up, placing his newest tat on top of many others on his arm. The Blink-182 drummer has been adding designs dedicated to girlfriend Kourtney Kardashian as of late, even letting his boo tattoo “I love you” on his arm.

He also got the words “Don’t trust anyone” added to his neck, potentially referencing ex-wife Shanna Moakler, who has been vocal about her dislike of Kardashian.

Machine Gun Kelly and Travis Barker
Machine Gun Kelly and Travis Barker at the 2020 American Music Awards.
Getty Images

MGK, 30, may have similarly celebrated his most recent relationship with permanent ink, with girlfriend Megan Fox making a cameo on his track “Banyan Tree (Interlude).”

“You just got my initials tattooed on you. I just got your nickname tattooed on me,” Fox can be heard saying in the recording, hinting at the couple’s coordinating tats.

The 35-year-old actress proudly showed off her “el pistolero” tattoo — Spanish for “the gunman,” a reference to her beau’s stage name — in November 2020.

Perhaps Kardashian will be next to get inked?