Lionsgate Films has released the first official trailer for Dan Mazer's upcoming comedy
Dirty Grandpa (2016), starring Zac Efron, Julianne Hough, Robert De Niro, Zoey Deutch, Aubrey Plaza, Dermot Mulroney, and Adam Pally. The film will open in theaters across the United States on January 22, 2016.
Right before his wedding, an uptight guy is tricked into driving his grandfather, a perverted former Army general, to Florida for spring break.