Up to one million people are expected to attend the Carnival to experience Caribbean culture, food, music and dance.
Thumping basslines, sizzling meat and tooting whistles filled the air as giant floats made their way from Westbourne Park Underground station, up Kensal Road, along Ladbroke Grove and down Westbourne Grove in West London.
One of the first groups to take to the streets was the charity Kinetika Bloco, whose dancers wore pink, green and white costumes while a brass band played songs from The Clash's Rock the Casbah to Daft Punk's Get Lucky.
Notting Hill Carnival has kicked off with an explosion of colour and music.
After fears the start of Europe's biggest street festival would be hampered by rain, the skies cleared and the sun shone on performers as they paraded through the streets of west London in bright costumes.
Europe's largest street festival will get underway today, as the Notting Hill Carnival takes place in west London.
The Caribbean event showcases a host of talents from music, dance to performance arts.
The Metropolitan Police confirmed this morning they arrested 152 people around the Notting Hill Carnival yesterday. A spokesman said:
This is broadly in line with what we expected. To give you an idea, on Bank Holiday Monday last year we made 172 arrests
Police confirmed a total of 36 men were detained and later arrested at London's Kings Cross underground station for fear they may cause trouble at the Notting Hill Carnival.
The large group, 19 of whom were aged under 18, was halted around 3.45pm to prevent a "potential breach of the peace," Scotland Yard said.
Revellers at the Notting Hill Carnival this year enjoyed sunshine, music and a heavy police presence. Police arrested more than 200 people.Read the full story ›
Despite the incidents, police say celebrations in west London have been largely peaceful.
At least 15 people have been arrested after people stopped a large group in London which they believed was set to cause trouble at the Notting Hill Carnival.
Around 34 were halted around 3.45pm at Kings Cross underground station to prevent a "potential breach of the peace," Scotland Yard said.