Minister for Women and Equalities Maria Miller has said the government would never introduce a bill that would damage religious freedom as MPs debate gay marriage.
She said: “We firmly support marriage, its one of the most important institutions that we have in our country.
"The government should not stop people getting married unless there’s a very good reason and being gay I don’t believe is one of them.”
The government will outline plans for same-sex marriage tomorrow.
Same-sex marriage will remain illegal in the Church of England, as the Government unveiled its plans to extend marriage to gay couples.
David Cameron is facing a backlash from Tory MPs and religious groups over allowing gay weddings in churches.