In September 2018, HenryCavill was announced to star in the series ... Geralt's Butcher of Blaviken Fight in 4K | The Witcher Season 1 The Witcher centers on three distinct storylines.
Regardless, once we know the year The Witcher 4 is set, we'll be able to figure out Geralt's age there too. My mind is a steel trap, no minutia of fantasy canon nonsense can escape it.