New blue 'cake topper' icons featuring either two grooms or two brides can now be used by married gay or lesbian couples for their Timelines.
Before, a heterosexual couple would appear as the default Timeline icon for marriages.
Facebook co-founder Chris Hughes became one of the first people to use the new icon, after he married his partner Sean Eldrige on Saturday (June 30).
The social network made 'in a civil union' and 'in a domestic partnership' options available for users in February 2011.
Last month, it also became the first social media company to win at the GLAAD Media Awards.
A new Facebook shopping 'want' button was recently discovered to be a possible new feature for the site.
The site also briefly launched a 'friends nearby' feature before pulling it offline immediately.