There's a growing number of big names on social media joining the campaign to vote yes for marriage equality, and today Brian O'Driscoll added his support. 

The Irish rugby legend tweeted out that he would be voting yes on the upcoming equality referendum, and used the #StraightUpForEqualtiy hashtag. 

He's not alone in his support either, as there are a huge number of other figures on Twitter who have been spreading the word on social media over the past few weeks, from The Rubber Bandits, to Bressie and the Script, and everyone in between.