Happy Birthday Massacre is a 2017 horror-slasher film.
A 14-year-old girl's birthday goes out of hand.
- Rowan Blanchard as Ashley Blake
- Mila Kunis as Kathleen Blake
- Jessica Belkin as Molly Andrews
- Brie Larson as Kelly Blake
- Skai Jackson as Nina McCloud
- Grant Palmer as Finn Till
- Max Charles as Glenn McCoy
- Jade Pettyjohn as Lucy Redford
- Madisyn Shipman as Daniella Parker
- Hadley Belle Miller as Abby Andrews
- Steffanie Scott as Kayla Roberts
- Blake Lively as Nora Andrews
- Oona Laurence as Dawn Peters
- Raymond Ochoa as Greyson Burns
- David Mazouz as Peter St. Wilkinson
- 1 Hr 49 Min
- Rated R for sexual content, language, and bloody violence throughout.