The new Pinewood Studio Wales will be based here in Wentloog in a building formerly used by environmental company G24i.
The space will be transformed into four studios.
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Cloudy with patchy rain or drizzle, possibly turning heavier for a time.
Organisers say there will be increased security at the Urdd National Eisteddfod, which began in Bridgend today.
Any remaining heavy or thundery showers will clear eastwards this evening.