Carolee Carmello, Andrew Keenan-Bolger and Marylouise Burke are among the thesps signed on to star in the Boston preem of “Tuck Everlasting,” the new tuner with its eye on Broadway.Casting wouldn’t necessarily remain fixed for the musical’s presumptive Rialto bow, but it wouldn’t be surprising if most or all of the actors moved with the show to Gotham if a Broadway run did in fact materialize. Newcomer Sadie Sink stars as a girl who falls for a boy, to be portrayed by Keenan-Bolger (“Newsies”), who turns out to be a member of a family of immortals. Carmello, perhaps the only consistently well-reviewed element in the recent musical flop “Scandalous,” appears as the mother of the boy with Michael Park, currently on the boards in the Scarlett Johansson topliner “Cat on a Hot Tin Roof,” who’s set to play the father. Burke (“Fuddy Meers,” “Is He Dead?”) is onboard alongside Fred Applegate (“Sister Act”), David Garrison (“Silence! The Musical”), Michael Wartella and Valerie Wright. Tuner is based on the 1975 YA novel by Natalie Babbitt. Story was twice adapted for the bigscreen, first in 1981 and then again in 2002. Latter pic starred Alexis Bledel in the central role. With a book by Claudia Shear (“Dirty Blonde”) and tunes by Chris Miller and Nathan Tysen (“The Burnt Part Boys”), “Tuck” is helmed by Casey Nicholaw (“The Book of Mormon,” the incoming Rialto staging of “Aladdin”). Creative team includes Walt Spangler (sets), Gregg Barnes (costumes) and Brian Ronan (sound). “Tuck” is produced by Gotham commercial team led by Broadway Across America — Beth Williams, Howard and Janet Kagan and Barry Brown. Show runs July 28-Aug. 18 at Boston’s Citi Emerson Colonial Theater.