The Mirror's Edge Catalyst Closed Beta begins April 22nd.

Mirror’s Edge Catalyst has been in development for a while now, after the release date being pushed from February to May we now have a date for the closed beta.
The closed beta will be on for 5 days, it will start April 22nd and it will end April 26th. If you have been selected for the Closed Beta and you are a Frontrunner, you will receive an email with your code on April 22nd. Other people will receive it April 23rd. Closed Beta participants will be able to try out several of the main missions in Faith’s story, Side Missions, and other optional content.
The beta is not the final product, it is used to give feedback to the developers so they can have a smooth launch.