The first vote on same sex marriage is taking place at Holyrood this afternoon.
A number of rallies supporting the bill have been held outside the Scottish Parliament building.
The Equality Network are expected to lead another rally ahead of today's vote.
A new video campaign has been launched urging people to back the introduction of same-sex marriage in Scotland.
"It's Time" features appearances from Scottish celebrities including Brian Cox, Lorraine Kelly, Alan Cumming and The Proclaimers.
The video was was produced for the Equality Network who are campaigning to extend marriage rights to same-sex couples.
The Marriage and Civil Partnership (Scotland) Bill is expected to be introduced to the Scottish Parliament this week.
The bill, which is supported by 88 of Holyrood's 129 MSPs, will end the legal definition of marriage as a union exclusively between a man and a woman.