Google has a deal right now where you can get 50% off any one movie rental. As long as you use this link, and rent before March 17th. Discount will be applied at checkout, then have 30 days to watch your movie before it expires.
This is a great way to put your Chromecast to use. Not quite as great as the free rentals they give out but still half off is better than nothing. You can hit the link above, or use the button below to get the deal now.
Limit 1 per user. Nontransferable. No cash value. Valid in US, CA, AU, BR, MX, UK, DE, FR, RU, IT, SE, NO, DK, FI, and ZA. Cannot be used in conjunction with other offers or discounts, except Google Play Credits. Age restrictions apply.