Zoey Deutch portrayed Stephanie Fleming in Why Him?
Zoey Francis Thompson Deutch -LRB- born November 10 , 1994 -RRB- is an American actress .. She is known for portraying Rosemarie `` Rose '' Hathaway in Vampire Academy -LRB- 2014 -RRB- , Beverly in the Richard Linklater film Everybody Wants Some !!. Vampire Academy. Vampire Academy ( film ). Richard Linklater. Richard Linklater. -LRB- 2016 -RRB- , Stephanie Fleming in Why Him ?. -LRB- 2016 -RRB- , Samantha Kingston in Before I Fall -LRB- 2017 -RRB- and Erica Vandross in Flower -LRB- 2017 -RRB- .. Before I Fall. Before I Fall ( film ). Flower. Flower ( film ). Her other film roles include Beautiful Creatures -LRB- 2013 -RRB- and Dirty Grandpa -LRB- 2016 -RRB- .. Beautiful Creatures. Beautiful Creatures ( 2013 film ). Dirty Grandpa. Dirty Grandpa