Boy band 'N Sync have reunited for U.S. comedy show Saturday Night Live's 40th Anniversary special.

Justin Timberlake, who has become one of the sketch show's most popular guest hosts in recent years, will return to the Snl world with his former bandmates when the special airs on Sunday night (15Feb15).

The group made the announcement via on Saturday (14Feb15), telling fans, "Together again... Gee, it's good to be together again" #Snl40."

'N Sync's one-time chart rivals the Backstreet Boys will also appear on the show, alongside former Snl regulars Eddie Murphy, Tina Fey, Chris Rock and Will Ferrell and special guests like Paul MCCartney, Jack Nicholson, Kanye West, Paul Simon, Taylor Swift and Jim Carrey.

The sketches the two boy bands and all the stars will appear in are being kept a closely guarded secret.