(LONDON) -- Britain's House of Commons voted in support of the Marriage Bill on Tuesday, which would enable same-sex couples to legally wed.
However, while it's endorsed by Prime Minister David Cameron, the measure still has to pass another vote in that chamber and faces an uncertain future in the House of Lords.
Many within Cameron's own Conservative Party remain opposed to allowing gays and lesbians to get married.
Since 2001, 11 countries around the world have permitted same-sex marriage, while a handful of U.S. states have also sanctioned the unions.
Cameron believes the Marriage Bill will level the playing field for people of all lifestyles in Great Britain, adding that besides equality, "it's also about a stronger society."
The prime minister also wants to modernize the Conservative Party despite ongoing resistance to the legislation.
British public opinion polls show 55 percent of respondents support same-sex marriage.
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