The trailer has dropped for a new Hollywood feel-good film about an award-winning Welsh race horse and the Rhymney Valley community who helped raise him.    

Dream Alliance , the horse that was bred and owned by a Cefn Fforest syndicate and went on to win the Welsh Grand National, is the subject of the upcoming rags-to-riches movie - and it looks set to follow in the vein of other celebrated Wales-set big screen projects like Miner's Strike dramedy Pride.

Starring Homeland and Billions-star,  Damian Lewis , and Hereditary and Muriel's Wedding actress Toni Collette, as well as famous Welsh faces like Owen Teale (Game of Thrones) and Twin Town's Di Botcher, Dream Horse tells the tale of the small group who raised the champion steed from obscurity to glory.

Toni Collete, Damian Lewis and Owen Teale all star in the film

The future four-legged champion was bought for £350 in 2000 by local woman Jan Vokes, her husband Brian and tax advisor Howard Davies.

The Alliance Partnership syndicate, made up of the trio's friends from the nearby workingmen's club,  paid just £10 a week each for the horse’s upkeep and training costs throughout his career.

However, despite such humble beginnings, the racehorse went on to become a sporting sensation - but its journey to the top was not without set-backs.

For example, the horse's career was almost ended when he severed a tendon at Aintree in 2008.

Toni Collette as Jan Vokes, the Cefn Fforest woman who bought and bred Dream Alliance

Undergoing stem cell treatment at a cost of £20,000, it still went on to win the feted Coral Welsh Grand National a year later.

Collette plays Vokes and Lewis is Davies and the film, shot on location in South Wales, looks to have the kind of winning formula to guarantee it performs like a thoroughbred at the box office.

What is more, the Welsh accents - from Aussie actress Collette, in particular - look good to firm.

Dream Horse opens at cinemas on Friday April 17.