The concert is called “Two Tiger Tenors,” though a third one will pop up late in the program.

But the LSU School of Music is keeping the surprise guest’s name under wraps for this free April 16 concert.

“It’s a surprise, but it’s going to be a good one,” said Robert Grayson, who will share the stage with former student and fellow tenor Paul Groves. “And it’s going to be a great program.”

Grayson is a professor of voice in the LSU School of Music, as well as an operatic performer whose credits include the Metropolitan Opera. Groves, one of his first students at LSU in 1984, has since embarked on his own international opera career, which also includes the Met.

The two will now take the stage together, with Grayson providing piano accompaniment for Groves through part of the program, which includes compositions by Henri Duparc, Franz Liszt and Sergei Rachmaninoff.

“These will be well-known songs written for tenors,” Grayson said. “And we’ll also be singing operetta songs.”

Groves makes his home in Covington and is coming to this concert after performing Hector Berlioz’s “Romeo and Juliet” with the Chicago Symphony Orchestra.

Groves began his tenure as the LSU School of Music’s artist-in-residence at the beginning of the spring semester. His duties include working with voice students in private coaching and public master classes.

Groves attracted national attention in 1991 as a winner of the Metropolitan Opera’s National Council Auditions and is a graduate of the Metropolitan Opera’s Young Artists Developmental Program. He made his Met debut in 1992 as the Steuermann in “Der fliegende Hollander.” His Met performances also include Camille de Rosillon in “The Merry Widow,” opposite Placido Domingo and Frederica von Stade, and as Don Ottavio in nationally televised season opening performances of “Don Giovanni” opposite Bryn Terfel and Renee Fleming.

In 2006, he created the role of Jianli in the world premiere of Tau Don’s “The First Emperor,” which also featured Domingo. He has since performed in the world’s leading opera houses and concert halls.

“What’s great about this concert is that you can come and hear someone who has spent 25 years singing at the Met, and there’s free parking and free admission,” Grayson said. “Paul’s continuing association with LSU is great for the School of Music, and he has been able to make calls for two students for intensive programs.”