Her reasons are mostly personal, she explained.
"I think I myself felt pressure a lot of times that I had to look or dress a certain way, and especially growing up with the industry," said Wood, who was accompanied Sunday by her new fiance. "So I thought, you know, I’m just going to go the other way and reach out to a little girl who is like me, possibly. So that’s what I’m going for this year."
She added, "It’s all about choice. Choice. Options."
At the time, she told E! News, "This is my third nomination, I’ve been to the Globes six times and I’ve worn a dress every time and I love dresses. I’m not trying to protest dresses, but I wanted to make sure that young girls and women knew that they aren’t a requirement and that you don’t have to wear one if you don’t want to -- to just be yourself because your worth is more than that."
Part of the reason Wood went public with her bisexuality in 2011 was to inspire others to be themselves.
She told The Advocate in a Twitter interview in 2014, "I also wanted to inspire people to be who they are. Maybe help another struggling, terrified 12-year-old know it's OK. And I didn't want to feel like I had to hide the women in my life."
But it's the man in her life who is currently taking center stage.
Wood was accompanied Sunday night by musician and actor Zach Villa, who, it turns out, is her fiance.
Her rep confirmed their engagement to ABC News after both were spotting wearing silver bands on their left ring fingers at the SAG Awards.
The pair reportedly met in 2015, when they performed together at a cabaret. Later that year, they launched their musical duo Rebel and a Basketcase. Rumors of romance first sparked when they held hands and cuddled up at the Critics’ Choice Awards last December.
Wood was previously married to actor Jamie Bell, with whom she has a 3-year-old son.