It ain’t no joke. The long-rumored Eric B. & Rakim reunion has finally come together.

The Long Island Music Hall of Famers will perform together for the first time in more than 20 years at Harlem’s Apollo Theater on July 7 to commemorate the 30th anniversary of their classic album, “Paid in Full.”

advertisement | advertise on newsday

“The time has come,” the duo tweeted. “New York, are you ready? Fans worldwide, prepare to book your flights. We are back, as promised, and you do know that!”

Tickets go on sale at 10 a.m. Friday through Ticketmaster.

Elmont native Eric B. and Wyandanch’s Rakim have been part of hip-hop history separately and together since “Paid in Full” arrived in 1987, which included the title track that Rolling Stone called one of the Top 10 greatest hip-hop songs of all time. They were finalists for induction for the Rock and Roll Hall of Fame in 2011, but not chosen.

Though the duo have no plans to record new music, they do hope to remaster all four of their albums and tour together.