GRETA Thunberg has arrived in Glasgow ahead of the COP26 climate conference. 

The Swedish climate activist arrived at Glasgow Central station this evening after boarding a train at Euston Station in London.

Thunberg was joined by a number of climate activists who also travelled to the city on a specially chartered "climate train".

Glasgow Times: [Image: Jane Barlow/PA Wire/PA Images][Image: Jane Barlow/PA Wire/PA Images]

They were greeted with cheers from groups gathered inside the station.

READ MORE: COP26: 'Climate train' to arrive in Glasgow tonight

Glasgow Times: [Image: Jane Barlow/PA Wire/PA Images][Image: Jane Barlow/PA Wire/PA Images]

Greta has arrived just one day before the United Nations Climate Change Conference begins in Glasgow.

Glasgow Times: [Image: Jane Barlow/PA Wire/PA Images][Image: Jane Barlow/PA Wire/PA Images]

However, she has said she has "not officially" been invited to COP26.

In a preview clip for The Andrew Marr Show, which will air tomorrow, she said: "I don't know. It's very unclear. Not officially."

She added: "I think that many people might be scared that if they invite too many radical young people, then that might make them look bad."

On Monday, Thunberg announced that she will be marching for climate justice in Glasgow.

The procession will begin in Kelvingrove Park at 11am next Friday with crowds heading towards George Square, where Greta is scheduled to speak.

Greta also called on striking workers in the city to join her.