The many friends who greet them think that Marco went to live with Star on Mewni and came back with a baby which they believe is Star and Marco’s baby but is instead Mariposa. Star and Marco hug after dancing to see if they still may have feelings for each other.
While this technically makes Marco 30 years old, biologically he is still a teenager.
↑ In “Running with Scissors”, Marco spends 16 years in another dimension before his body is reverted back to that of a 14-year-old. You might be interested: Often asked: Why Is Tia's Husband In Prison? How old is Marco Diaz?
