His Royal Princess (Billionaire Boys Club Book 3.5)

Their romance led to a royal wedding in Once Upon a Billionaire. Now see how it all began for Princess Alexandra of Bellissime and American actor Luke Houston in this novella from New York Times bestselling author Jessica Clare.
As heir to the throne of Bellissime, Princess Alexandra is supposed to be cool and calm...not crushing on a movie star. When she hears that Luke Houston is filming a scene for his next movie in her tiny country, however, she can’t resist sneaking onto set to get a glimpse of the Hollywood hunk. 
When Alex is almost caught on set by the press, she ducks into the first available hiding place—only to find herself in Luke’s private trailer, and getting much more than just a glimpse of him. It’s an up close and personal encounter that sets her heart aflutter, and sets her mind on some very unladylike plans to get to know him better...