As stated above, preferably with an axle stand " just in case ", hold wheel as though you are lifting it off by holding on tyre, now hit tyre with palm, follow by hitting opposite side.
Once removed ( hopefully ), clean hub and inside of wheel with some emery paper, and grease before refitting.
Was it bought from a garage? Reason for asking, if it's been serviced lately, have the wheels been off? If so, why were hubs not greased to prevent this!?
2010 Titanium 2.0 TDCI Panther Black.