The actress, who is most famous for starring in hit family films Matilda and Mrs. Doubtfire, revealed that after years of identifying as straight, lately she is now more comfortable with a different label.

Mara, 28, discussed her sexuality in the wake of the mass shooting at a gay nightclub in Orlando in the early hours of Sunday morning (12Jun16). After discussing the murders with her followers on Twitter, she shared a throwback photo of her younger self at a gay club.

Mara wrote: "Me at a gay club when I was eighteen. I feel embarrassed looking at it now... Being a 'straight girl' where I clearly didn't belong, but I will say, I felt so welcomed there... the LGBTQ (lesbian, gay, bisexual, transgender and queer) community has always felt like home, especially a few years later when I, uh, learned something about myself."

On Monday night Mara returned to the issue of her sexuality as she posted: "Well, tumblr knows my secret now."

When a follower tweeted the actress asking her to clarify her sexuality she replied: "Let me put it this way: I'm a 2," referencing the Kinsey Scale, also called the Heterosexual–Homosexual Rating Scale. The Kinsey Scale is used in sex research to describe a person's sexual experience or response at a given time.

Ranging from 0, meaning exclusively heterosexual, to 6, meaning exclusively homosexual. According to the Kinsey scale, a No.2 person is "predominantly heterosexual, but more than incidentally homosexual".

The actress-turned-writer and playwright continued, "Your support is much appreciated. I will say, though, I'm still gonna be pretty private about my relationships, as I always have been.

"I *used* to identify as mostly straight. I've embraced the Bi/Queer label lately."

Mara made her big screen debut when she was just six years old alongside Robin Williams and Sally Field as their youngest daughter Natalie in hit 1993 comedy-drama Mrs. Doubtfire.

She followed up with roles in Miracle On 34th Street, but her biggest role was the lead in the 1996 film adaptation of Roald Dahl's classic children's novel Matilda, in the titular role starring with Danny Devito and Rhea Perlman.