The Los Angeles-based producer, who also directed and co-wrote the Big Short that chronicled the subprime mortgage crisis in America, said the clock started this morning to pledge cash to the British campaigners.

He is also one of a group of multi-millionaires behind the Climate Emergency Fund that raises cash from wealthy supporters to fund activists, including nearly £1million already donated to Just Stop Oil.

Mr McKay, 55, said: 'The scientific reality is we will hit 1.5C global warming in the next 18-24 months which should greatly alarm each and every person on this planet.

Hollywood director Adam McKay, has said he would match any funds given to Just Stop Oil by three times as much

'I stand with those taking action to defend the climate to wake up the world's sleeping governments to the terrifying scale of the catastrophe we are now living through.'

On Wednesday Ecotricity founder and Labour Party donor, Dale Vince, also pledged to double any donations for a 48-hour period. He raised £173,000 in donations through a crowdfunder site.

However Mr McKay was accused by Gareth Johnson, the Tory MP for Dartford, of hypocrisy over his lavish holiday home in Ireland – 5,000 miles from his Los Angeles base.

Mr Johnson said having Hollywood stars helping to disrupt the lives of hard-working Britons damaged their cause.

'It's ironic that these people say that they want to help the planet while at the same time one of them appears to be harming it with travel to a holiday home thousands of miles away from where he lives.

'I'm sure these multi-millionaires wouldn't like their travel plans disrupted but they are only too happy to have the travel plans or ordinary people disrupted, he said. 

It comes as earlier today, a furious workman confronted Just Stop Oil protesters today as they continued their slow marching campaign of disruption in the capital.

Responding to a protester who said 'people can't pay their bills' amid the cost of living crisis, the man shouted 'people can pay their bills if they can get to work!' as he confronted the group on Marylebone Road in the centre of the capital. 

Just Stop Oil protesters caused further disruption today as they blocked traffic in London, a day after they held up the England cricket team on the way to Lord's. Above: Protesters on Finchley Road, north-west London this morning

He then told one of them to 'run yourself over' as they continued to walk slowly down the road.  

Pictures also showed protesters on the road speaking to an ambulance driver, as other members of the group blocked traffic on the Finchley Road in north-west London.   

The Metropolitan Police said later this morning that the protesters moved off Marylebone Road after being issued with conditions under the Public Order Act.  

It comes after they blocked the England cricket team's bus in Kensington Gore, south London yesterday as part of a wave of protests that hit the capital. 

Batter and wicket-keeper Jonny Bairstow said on Instagram: 'If we are a bit late it is not our fault.'

Elsewhere yesterday, the group held up traffic in Wandsworth, Chelsea Bridge, Southwark, Waterloo and Kensington.

They began their protest at 8am, with 50 demonstrators holding up traffic by slowly marching on roads around Hyde Park and Battersea Park.

Around 30 minutes later, four protesters walked in front of the England cricket team coach as it headed to Lord's for the team's test match against Ireland.

The group insisted they had not deliberately delayed the bus, which was held up for 15 minutes but still arrived at Lord's in time for the start of play at 11am.