London Mayor Boris Johnson has recorded a video for the Out4Marriage campaign, which supports the British government's plan to legalize gay marriage by 2015.

“Hi folks, I'm Boris Johnson, I'm Mayor of London,” Johnson says in the 38-second spot. “One of the amazing things about London is that it's not only got a declining crime rate, declining murder rate, more theaters than New York, less rainfall than Rome but it's also one of the few places in the country where the rate of marriage is actually increasing and I see absolutely no reason why that happy state should be denied to anybody in our country. And that's why I’m supporting the Out4Marriage campaign.” (The video is embedded on this page. Visit our video library for more videos.)

Johnson, a popular Conservative, has previously backed gay nuptials and won reelection in May.

Out4Marriage welcomed Johnson's participation.

“Boris Johnson was one of the first senior Conservative politicians to back the idea of equal marriage, doing so in public before the Prime Minister [David Cameron],” Out4Marriage spokesman Benjamin Cohen told London daily Evening Standard.

“He like many has been on a journey when it comes to this issue and we welcome his support for Out4Marriage as we edge closer to the publication of draft legislation to allow gay couples to marry.”