Oscar nominated actor Mark Ruffalo has called on the Prime Minister to abandon fracking and leave fossil fuels in the ground.
A prominent opponent of fracking in the US, Ruffalo warned David Cameron he was making "a legacy mistake" in supporting the controversial process of extracting gas by hydraulic fracturing.
Ruffalo, who has attracted critical acclaim for his role in the film Spotlight, and is nominated for best supporting actor at this year's Oscars, made the remarks in an interview with environmental pressure group Friends Of The Earth.
On Tuesday a planning inspector will hear energy firm Cuadrilla's appeal against last summer's rejection of plans for exploratory fracking in west Lancashire by county councillors.
In a direct message to the PM, Ruffalo said:
Ruffalo was a vocal support of the fracking ban in New York State and has similarly appealed to President Barack Obama to ditch fracking and instead focus on renewable energy.
Donna Hume, Friends Of The Earth senior campaigner, said:
Lancashire, thought to hold major shale reserves and where fracking had been under way before being halted because of earthquakes, has been seen as the most likely bet for getting the industry going.
But the Government's backing for the development of shale gas in the UK received a blow last June when councillors turned down schemes to drill and frack for shale gas between Blackpool and Preston.
One scheme at Roseacre was opposed due to traffic concerns, while councillors went against the advice of their own planning officials for the second scheme at Little Plumpton and rejected it because of adverse landscape and noise impacts.
The planning inspectorate inquiry starts on Tuesday at Blackpool FC Hotel & Conference Centre. It is expected to last five weeks.
A spokeswoman for the Department of Energy & Climate Change (DECC) said: