Dame Emma Thompson stood on top of a pink boat that has blocked traffic from Oxford Circus for five days as she rallied the Extinction Rebellion demonstrators in London today. The Hollywood actress, who jetted into London Heathrow from Los Angeles on Wednesday, laughed with demonstrators in the capital as youth members of the group held a so-called 'Day of Love'. After telling how she 'can't even describe the level of hypocisy from our government', Dame Emma ascended the ladder to the deck of the boat to cheers from the crowd, before dozens of police officers surrounded them. Dame Emma told reporters at Oxford Circus that she had come to support the movement and had been greatly inspired by it, adding that her generation and politicians had failed young people. The 60-year-old Love Actually star, who posed with a £91.50 Vera Pelle leather backpack, said: 'We have seriously failed them and our planet is in serious trouble, we have much, much less time than we thought. Dame Emma speaks to protesters this morning from the pink boat that has blocked traffic from Oxford Circus for five days Dame Emma talks to members of the media from on top of the pink boat after police officers surrounded it today Dame Emma stands on the boat as she speaks to climate change activists occupying the road junction at Oxford Circus today Dame Emma speaks from the deck of the pink boat today as the Extinction Rebellion demonstration in Oxford Circus Actress Emma Thompson (left) joins Extinction Rebellion demonstrators at Oxford Circus in London this morning Dame Emma laughs with demonstrators at Oxford Circus as youth members of the group hold a so-called 'Day of Love' today Dame Emma points to a 'There is No Planet B' label on a £91.50 Vera Pelle leather backpack as she appears in London today Dame Emma joins the Extinction Rebellion protest at Oxford Circus as she speaks from on board the pink boat today 'I have seen the evidence for myself and I really care about my children and grandchildren enough to want to be here today to stand with the next generation.' One officer told bystanders that there was an ordinance to clear the area, with dozens of officers stationed beyond the group by a number of police vans parked in Regent Street. When asked if she was willing to be arrested, Dame Emma - who admitted she had been 'banging on about it for years' in reference to climate change - shrugged and said something off mic that could not be heard properly. The actress said : 'This is the most pressing and urgent problem of our time, in the history of the human race.' When asked whether protesters were having too much fun, Dame Emma said protests should have a sense of joy. She added: 'If you can't have fun whilst saving the planet, what's the point? 'Protest should always have a sense of joy in it because what we are protesting about is saving this extraordinary home of ours and also celebrating the passion and inspiring energy of this young generation. 'These are young people who have finally said to my generation 'I'm so sorry but you have failed us'. We all feel dreadful about that. My feeling is I feel massively inspired by this young generation and want to stand next to them.' Dozens of officers strode into the crowd of activists today and started to surround the pink boat which Dame Emma was in Dame Emma ascended the ladder to the deck of the pink boat parked at Oxford Circus today to cheers from the crowd Dame Emma said at Oxford Circus today that she had come to support the movement and had been greatly inspired by it Dame Emma is interviewed for television as she stands among demonstrators at Oxford Circus in London this morning Dame Emma told the protesters at Oxford Circus in London this morning: 'We are here in this little island of sanity' Dame Emma said her generation and politicians had failed young people as she encouraged the protesters in London today