Kourtney Kardashian and Travis Barker's son's name has officially been confirmed.

The couple chose the name Rocky Thirteen Barker for their baby, according to the child's birth certificate obtained by The Blast.

The Lemme co-founder and the Blink-182 drummer welcomed their son on Nov. 1 at Cedars-Sinai Medical Center in Los Angeles.

Barker had previously confirmed what he and his wife planned to name their son during an episode of the "One Life One Chance" podcast last month.

"I was like he's going to come out of the my wife like doing front kicks and push ups," Barker told Toby Morse.

He first expressed his interest in the name back in July.

Explaining the significance behind the name, the 47-year-old musician mentioned in an episode of Complex's "GOAT Talk" video series that "Rocky George played guitar for Suicidal Tendencies." Barker added that the name was also inspired by the iconic 1976 film "Rocky," which he described as "the greatest boxing movie of all time."

Additionally, the middle name "Thirteen" holds personal significance for Barker, who considers it "the greatest number of all time," evident by his tattoos of "1" and "3" on a skull near his elbow.

The name Rocky Barker was also hinted at the couple's Disney-themed baby shower in September.

One of the decorations at the party was a "Wishing Tree" with a sign encouraging guests to share their wishes and advice for "Baby Barker."

A close-up of a note hanging from the tree suggested the name Rocky for the newest addition to the Barker family.

Kardashian is already a mother to daughter Penelope Scotland, 11, and sons Reign Aston, 8, and Mason Dash, 13, with ex Scott Disick.

On the other hand, Barker shares daughter Alabama Luella and son Landon, 19, along with stepdaughter Atiana De La Hoya, 24, with his ex-wife Shanna Moakler.

This isn't the first time Barker has chosen a movie-inspired name for his kids as his daughter Alabama shares her name with the main character from one of his favorite films, "True Romance."

"We all have very authentic, weird names," Alabama recently told E! News.

She also gave the name Rocky her stamp of approval for her new baby brother and expressed excitement about welcoming a new member to the family.

"I just think having another family member is always awesome," she said. "And getting to know a new person, it's gonna be so fun and so exciting!"

Tags: kourtney kardashian travis barker