Just In Time, the Bobby Darin jukebox musical starring Jonathan Groff opening tonight at a wonderfully dressed Circle in the Square on Broadway, does some serious and genuine starmaking, twice over in fact. Darin, the once hugely popular but now barely remembered nightclub singer and Top 40 hitmaker is returned to a spot in our cultural memory, and Groff, the Tony-winning star of last season’s Merrily We Roll Along and for years now one of the stage’s more popular young actors, newly emerges to the top ranks of the best, most natural all-around entertainers working today.

Some performances – think Liza Minnelli in the film Cabaret, or Hugh Jackman in Broadway’s The Boy From Oz – send their stars into new stratospheres, something outside the labels “actor” and “singer” and into that exclusive circle of stars who can hold a stage both as a character and as themselves, instantly recognizable and unique.