The Warner Bros Studios Leavesden (WBSL) expansion is set to "create 4,000 jobs" nationwide and contribute "more than £200 million" to the UK economy.

The firm behind the Harry Potter film franchise is also set to become a primary production hub for DC Studios as part of a boost for the UK film and TV industry.

Entertainment company Warner Bros Discovery said WBSL will be expanded with 10 new sound stages and an additional 400,000 sq ft (37,000 sq metres) of production and support space.

Production capacity at the expanded Hertfordshire location will grow by more than 50 per cent.

The project is anticipated to create 4,000 “direct or indirect” jobs across Britain and grow WBSL’s contribution to the UK economy by “more than £200 million”, Warner Bros Discovery said.

Groundbreaking on the project is set to begin next year, with the expansion expected to be completed in 2027.

The global hit Barbie movie and HBO series House of the Dragon are among recent productions shot on WBSL’s sound stages.

The studio also developed the Harry Potter franchise, and its fan tours are a significant tourist attraction.

Chancellor Jeremy Hunt described Warner Bros Discovery’s investment in the site as a “huge vote of confidence in the UK”.

He said: “The enormous strength of our creative industries sees films and television shows made in the UK reaching cinemas and front rooms across the world, including Barbie and the House Of The Dragon series.

“Warner Bros Discovery’s ambitious plan to grow its Leavesden studio is a huge vote of confidence in the UK – creating thousands of jobs and growing our economy – and means that British-made entertainment will continue to delight and entertain global audiences.”

Prime Minister Rishi Sunak added: "It’s brilliant news that Warner Bros Discovery have announced a £400 million investment to expand its Leavesden studio, so British-made entertainment will continue to delight and entertain globally."  

Simon Robinson, chief operating officer of Warner Bros Discovery Studios, said: “Warner Bros Studios Leavesden is globally recognised for its exceptional sound stages and facilities, and with this planned expansion adding significant capacity and capabilities, it will be home to even more incredible storytelling for both film and television projects.

“We are proud to not only be growing our productions in Leavesden and making it the main hub for DC Studios, but also to be growing our economic and community contributions to the UK’s creative sector.”