Cortana will soon be accessible from the Android lock screen
As part of Microsoft's grand scheme to put Cortana in everything, the AI assistant will soon be accessible from the lock screen of your Android device with a single swipe (provided that you're using the Cortana app to begin with). The feature is currently available to beta testers and should make its way to the stable version of the app soon.
Once enabled in-app, Cortana will pop up as a small, round icon at the bottom of your lock screen, and, in a similar fashion to the dialer and camera shortcuts found on many devices, it can be activated by swiping up from the icon. From then on, you can get all your usual updates and information in the familiar card-like format.
Furthermore, this feature doesn't override your current lock screen, meaning that you can still use it on your device's stock lock screen or a custom one, like Microsoft's own Next Lock Screen.
If you don't feel like waiting and want to try out Cortana on your lock screen right now, you can enroll in the beta program by following the link below.