They're getting back together like it's the 90s all over again!

The boys of 'N Sync and the Backstreet Boys will reunite once again for Saturday Night Live's 40th Anniversary Special later today in what's already been a jam packed line up which includes Taylor Swift, Kanye West, Paul McCartney, Paul Rudd, James Franco, Derek Jeter, Betty White, Melissa McCarthy and many more.

"'Together again...Gee, it's good to be together again' #SNL40," 'N Sync's official Twitter account posted days ago.

The guys of 'N Sync have been BFFs since their split in 2002 but recently performed alongside Justin Timberlake's MTV VMA Vanguard performance in 2013. It's still up in the air as to what the Backstreet Boys have up their sleeves but an Instagram post from Timberlake, which showed him brainstorming with Jimmy Fallon and others, could give us a big clue for what both boy bands have in mind!

See what shenanigans these guys have in store for the Saturday Night Live 40th Anniversary Special Sunday night!

Writing session for #SNL40. @jimmyfallon is onto something funny... We think. This Sunday!!

A photo posted by Justin Timberlake (@justintimberlake) on