Vector-boson scattering (VBS) processes have just started to be measured at the Large Hadron Collider (LHC).
This is particularly exciting because this class of processes has been thought to be a possible window to new physics.
But VBS is also interesting in its own right because it probes the Standard Model in extreme phase-space regions at high energy.
The measurements of such processes is particularly challenging due to their low rates and large background.
In this talk, I present recent theoretical predictions necessary to perform such measurements.