Official SING Trailer Here is the official SING trailer! The film, written and directed by Garth Jennings (Son of Rambow, The Hitchhiker’s Guide to the Galaxy), stars the voice talents of Scarlett Johansson, Taron Egerton, Matthew McConaughey, Reese Witherspoon, Nick Offerman, Seth MacFarlane, John C. Reilly, and Leslie Jones. SING will be released in theaters on December 21. A koala named Buster recruits his best friend to help him drum up business for his theater by hosting a singing competition.