YMMV. There are a couple of recent options for getting a 50% off movie purchase promo at Google Play.
1. Check your Gmail for "Get Bunyan & Babe free before theaters + take 50% off any movie to own". Link to redeem will be included. Use by Feb. 28th.
2. Use coupon code: https://play.google.com/store?cod...SDHF7MDBUG
This one is most likely only for new accounts with little to no history.
Both of these are YMMV.
If you are lucky enough to get it combine with the Disney Princess sale or use on other DMA titles which will port to connected services.