The Mayor of London, who attended the monumental event on Satuday (January 21) was captured on camera wedged between singers at the march.
The group, singing Sister Sledge's hit 'We are Family', surround the Mayor and get him to sing along - or try to.
Khan appears to be getting a little shy in getting his sing on though, as he takes a back seat and listens to the demonstrators instead, before adding a few lines here and there.
Party leader, Sophie Walker, said: "This year I want to lead a party and a movement of women and men who will stand strong in the face of racism, sexism, homophobia and all other kinds of discrimination.
"We must unite to protect our rights in the face of a US administration and uncertain Brexit negotiation.
"We must protest an environment in which many minorities feel threatened.
"We must build tolerance and diversity at all levels of society."
The celebrity turnout included Charlotte Church, model and fashionista Alexa Chung, Emma Watson and even Ian McKellen.
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