Porter, an ensemble member from the original Broadway cast, has also appeared in Five Guys Named Moe, Smokey Joe's Cafe and as Teen Angel in the original revival cast of Grease!. Most recently, he played Jesus in the South Africa set revival of Jesus Christ Superstar at the Helen Hayes Performing Arts Center in Nyack.
Porter replaces current John, Leonard Joseph, an original cast member who played a Marine when the show first opened in 1991.
Also in the Saigon cast are Will Chase (Chris), Luoyong Wong (the Engineer), Margaret Ann Gates (Ellen) and Yancey Arias (Thuy). Alex Lee Tano plays Kim at certain performances.
Salonga is confirmed to remain with the cast through June 12. For tickets and information, call (212) 239-6200 or (800) 432-7250.