The close friends revealed the festive track took them “eight or nine hours” to record because they were “crying laughing”

Justin Timberlake and Jimmy Fallon on ‘The Tonight Show Starring Jimmy Fallon’. Photo: The Tonight Show Starring Jimmy Fallon/Youtube

Jimmy Fallon and Justin Timberlake are honoring their “bromance” with a new song!

The pair revealed on the latest episode of The Tonight Show with Jimmy Fallon that they collaborated on a tune that will be featured on Fallon’s upcoming Christmas album — something which the late night host, 49, described as an ode to their friendship.

“We went to Electric Lady [to record it],” Timberlake shared on the Monday, Sept. 16 episode, before jokingly adding, “We had no business recording this song at such a fantastic, world famous studio.”

“What are you talking about? This is a high quality song,” Fallon responded.

The comedian went on to say that Electric Lady studios was “unbelievable” and that it was the “best place to record a record.” He explained, “Legends have been there and then they let me in there and I go, ‘Oh my god.’ So I go, ‘Justin I can’t believe I’m in this thing.’ ”

“Also, the session probably should have only taken like two to three hours. We were there for like eight hours. Eight, nine hours,” the “Can’t Stop the Feeling” singer, 43, recalled.

Fallon admitted that they took so long to record because they were “crying laughing” and described their song — called “You’ll Be There” — as “a silly song,” noting, “it’s about kind of a bromance.”

“I mean it’s — it’s us,” Timberlake shared, before the pair burst into laughter.

“It’s us saying, like, ‘Hey, you’ll be there. You’ll be there for me this Christmas,’ ” Fallon added, before asking the audience if they wanted to hear a bit of it.

Justin Timberlake and Jimmy Fallon dancing to their Christmas song on ‘The Tonight Show Starring Jimmy Fallon’.The Tonight Show Starring Jimmy Fallon/Youtube

Fallon then pressed play on his computer as the first notes of a ukelele could be heard playing, prompting Grammy winner Timberlake to say, “nothing says Christmas like a ukelele.”

“This already started with a curveball,” Fallon said as he burst out laughing again.

The pair could then be heard singing the lyrics, “Tell me you’ll be there/Whenever the snow starts falling … Tell me that you’ll be there/The only thing on my wishlist is that you’ll be home for Christmas.”

Jimmy Fallon and Justin Timberlake at the 2015 US Open.Jean Catuffe/GC Images

Timberlake and Fallon got up to dance to the song before Fallon finally paused it, noting that it was “just a taste” of what was in store. “It’s a jam,” Timberlake added.

Fallon and Timberlake have been friends for over 20 years after first meeting at the 2002 MTV Video Music Awards where they bonded over their nervousness performing on stage. Since then, the duo have not been afraid to show off their friendship on social media and on the Tonight Show. Timberlake has appeared on the NBC talk show numerous times and the pair have done everything from performing together and creating fun music-videos to playing the “Best Friends Game.”

Fallon’s new Christmas album will be released on Nov. 1.