Sporting a heavy slick of eye-liner and pink gloss, the British hitmaker, 27, who came out as non-binary earlier this year, took to Instagram with a selfie before he headed out in the British capital to celebrate.
The pop sensation proved to be in his element as marched alongside thousands of revellers in the capital for what has been hailed as London’s biggest Pride parade yet.
Sam joined the vibrant sea of paraders to honour five decades of activism, protests and victories and mark 50 years since the Stonewall uprising in New York on Saturday.
The Stay With Me hitmaker sported a tie-dye T-shirt and a pair of white jeans as he walked through the streets and posed for selfies with excited fans.
Sam was also sure to take time out and light up his Instagram account with a series of fun clips from the occasion.
In March, Sam bravely came out as non-binary and opened up about being at war with his body and mind during Jameela Jamil’s new I Weigh Interview series.
The four-time Grammy winner admitted: ‘You do not identify in a gender. You are just you. You are your own special creation. That is how I take it. I am not male or female. I think I float somewhere in between – somewhat on the spectrum.’
He added: ‘I’ve always had a bit of a war in my body and my mind… I do think like a woman in my head at times.’
In an interview with GQ Magazine the singer later described not feeling ‘comfortable’ with belonging to either sex.
He said: ‘Ever since I was a little boy, ever since I was a little human, I didn’t feel comfortable being a man really. I never really did.
‘Some days I’ve got my manly side and some days I’ve got my womanly side, but it’s when I’m in the middle of that switch that I get really, really depressed and sad.
‘Because I don’t know who I am or where I am or what I’m doing, and I feel very misunderstood by myself. I realised that’s because I don’t fit into either.’
Meanwhile, Saturday’s celebrations, which kicked off at Portland Place before finishing up on Whitehall, mark 50 years since police officers raided the Stonewall Inn, a gay club in New York, and ignited six days of protests and violent clashes.
The riots, which came to be known as the Stonewall uprising, marked a pivotal turning point for the gay liberation movement.
With organisers predicting that as many as 1.5 million people are expected to turn up to the event, the celebrations also saw a parade with 30,000 participants from 600 groups.
The annual explosion of colour, music and dance also welcomed a new World Area at Golden Square in Soho in a bid to celebrate diversity and increase the visibility of black, Asian and minority ethnic LGBTQ+ people.
Also spotted among the crowds was Lord Of The Rinds star Sir Ian McKellen and London Mayor Sadiq Khan.