The Good Charlotte rocker, 35, showed off his fresh new ink, which features 'Cameron' written underneath his collarbone in elaborate cursive, via his Instagram account, reported Us magazine.
"Thinking bout you #LuckyMan," Madden captioned the shirtless selfie.
The permanent move comes just over a month since the couple tied the knot on January 5 at 42-year-old actress' Beverly Hills pad in front of family and friends including Nicole Richie, Drew Barrymore, Gwyneth Paltrow, Samantha Ronson, Lionel Richie, Toni Collette, Nancy Juvonen, among others.
The couple dated just over a year before getting married.