Hollywood A-lister Johnny Depp claimed Donald Trump would be the United States' last ever president because 'it just won't work after that'.

Speaking on the red carpet of the premier of his latest film, Depp, 52, claimed a Trump victory in November would provide excitement in a historical kind of way.

However, Depp said he could never support the controversial billionaire business mogul because he 'does not believe in that stuff'.

Johnny Depp, right, told 5 News' Minnie Stephenson, left, about his reservations over a 'President' Trump

Hollywood star Johnny Depp, pictured last night in London, claimed a Donald Trump victory in November could bring about an end of the US presidency but admitted it would provide historical excitement along the way

Depp, center, was at the European premiere of his latest movie Alice Through The Looking Glass

Depp was in London for the screening of Alice Through the Looking Glass.

He told Minnie Stephenson of Channel 5: 'If Donald Trump is elected President of the United States, in a historical way it is kind of exciting, because we will see the actual last president of the United States. It just won’t work after that.'

He added: 'I'm not into that kind of stuff.'

During one visit to the British capital in 1999, Depp was arrested by police after he was involved in a scuffle with photographers outside a restaurant.

He appeared at the premiere without his wife Amber Heard, 30. He said he was pleased she was 'putting up with him'.

He said: 'I think everybody has a sense of themselves, we are all living our lives together and living closely with someone.

'I know I wouldn't be considered normal, I suppose, so I thank her for that. I thank my mum for that, I thank my father for that, for putting up with me.

'I also thank the London policemen when I was arrested here, they were very nice and gave me a cup of tea.'

His wife Heard recently avoided jail in Australia after pleading guilty to providing a false immigration document amid allegations she smuggled the couple's dogs Pistol and Boo into the country.

The pair went on to record a bizarre video in which they apologised and spoke about how important it is to protect Australia's biodiversity.

Depp claimed Trump, pictured, would doom the US presidency if he is elected to the White House in November

In his new film, Depp returns to the role of the Mad Hatter after the huge success of Alice In Wonderland, which was directed by Tim Burton in 2010.

British comedian Sacha Baron Cohen also stars in the movie.