The main cast ( Henry cavill, anya chalotra freya allan and joey batey) will be back on camera for the season 2. 

Series executive producer and series supervisor Lauren Schmidt Hissrich:

tvguidetime.com

Reactions to the first season of The Witcher set the bar too high for the second season cast. Reactions to the first season of The Witcher put the expectation very high for the season 2 cast.Sophie Holland and her team brought together the best actors in the field to bring new characters to life. We are extremely excited about the new stories

The wither season 2  netflix release new cast for season 2   TG Time - 9