The band comprised of Brian Littrell, Nick Carter, AJ McLean, Howie Dorough and Kevin Richardson, who rejoined last year after taking some time out, will host a special show for their supporters at the famous Hollywood venue, reported Hollywood Life.
"Ready to party BSB style on April 20th? We're having our 20th Anniversary Fan Celebration at the @FondaTheatre in LA, and you're invited," they tweeted.
This will be followed two days later by the unveiling of their own star on the Hollywood Walk of Fame.
"We always wanted to make a film and now is the ideal time. With Kevin back, the fact that we are masters of our own destiny, a new album in the works and our 20th anniversary - it all adds up to being the right time to share our story," the group said.