This finally brings Scotland into line with England and Wales.
Gay people have always been able to adopt but only as individuals but the new law that comes into force today under the Adoption & Children (Scotland) Act 2007 will give legal rights to both partners.
This piece of legislation is from the days of the Labour/Liberal Democrats administration.
Predictably the Church of Scotland has criticised the move, saying gay relationships are "profoundly unstable".
I've been with my partner for 16 years and neither we or our relationship are unstable. But seriously, how on earth can the Church of Scotland say that gay relationships are unstable as a cause for a child not to be adopted, surely a gay couple (or an unmarried couple) is way better than an individual parent, gay or straight? Is the Church of Scotland really thinking about the children here or just being narrow minded?
Scotland’s director of the British Association for Adoption and Fostering said: "BAAF sees this act as recognising the need for a social care framework that is sensitive to the needs of children and not hung up on legalities.
"Finally, the act is ensuring that all those working within adoption in Scotland are striving to put the needs of children first. It is trying, wherever possible, to shape the legal process around the needs of children with speed and sensitivity and without harming the rights of the birth parents."