EXCLUSIVE: Black Bear is handling international sales on the horror title White Elephant at the Cannes market .  The film features a robust ensemble including Nick Jonas ( Jumanji ), Kathryn Newton ( Ready or Not 2: Here I Come ), KJ Apa ( Riverdale ), Alexandra Shipp ( Barbie ) , Ashley Park ( Emily in Paris ), Justice Smith ( Now You See Me: Now You Don’t ), Josh Brener ( Silicon Valley ) and Madeleine Arthur ( To All the Boys I’ve Loved Before trilogy). Eli Craig ( Tucker and Dale vs. Evil ) directed the movie based on a script from JT Billings ( Are You Afraid of the Dark? ), with additional writing from Craig. The plot is said to follow eight friends competing for a prize when their annual holiday gift exchange spirals into a cutthroat game of carnage. MRC is the studio financing the film.…