Millions of revelers are expected to attend Gay Pride parades in London and Madrid on Saturday.

Organizers in Madrid are expecting 1.5 million people to attend a 3-day festival that features a 1.2 mile parade on Saturday that winds from Puerta de Alcala to Plaza de Espana in the city center.

A smaller parade in London is set to host hundreds of thousands of revelers and includes roughly 150 floats winding from Portland Place to Trafalgar Square, where the party will keep humming well into the night.

London Mayor Boris Johnson's absence from the annual event has stirred up talk that the mayor is shying away from the gay community.

Ahead of the party, Johnson, who marched in last year's parade, said he wants London to be a leader in gay rights.

“I want London to be the benchmark for LGBT equality, which is why we must not be complacent, especially when it comes to homophobic hate crime and bullying,” he said. “My office will continue to work with LGBT groups as well as the police to tackle a problem that still affects too many lives.”

Attending his first London Gay Pride, UK rugby star Ben Cohen endorsed marriage for gay and lesbian couples. Britain currently recognizes gay couples with civil partnerships. Cohen, however, refused to comment on Johnson's absence.

“It's a very political question,” Cohen told gay weekly Pink Paper. “And it's not something I feel comfortable commenting on.”

London is the host city of 2012 WorldPride, a two-week long touring gay pride festival which will take place ahead of the Olympic Games.