“In me is the capacity to be girlish boy, boyish girl, boyish boy, girlish girl, all, neither.”

Sara Ramirez has quietly confirmed their gender identity.

The Tony winner, who’s best known for their role as Dr. Callie Torres on Grey’s Anatomy, shared a new selfie on their social media channels earlier this week with the caption: “In me is the capacity to be girlish boy, boyish girl, boyish boy, girlish girl, all, neither.”

Ramirez ended their post with the hashtag “#nonbinary,” followed by a series of heart emojis in the colours of the non-binary flag. Their Twitter bio – which states their pronouns as she/they – now also reads “non-binary human”.

The star, who has extensively campaigned for LGBTQ+ rights throughout their career, previously came out as bisexual and queer in 2016 during a speech at the True Colors Fund’s 40 to None Summit.

“So many of our youth experiencing homelessness are youth whose lives touch on many intersections – whether they be gender identity, gender expression, race, class, sexual orientation, religion, citizenship status,” they said.

“Because of the intersections that exist in my own life: Woman, multi-racial woman, woman of color, queer, bisexual, Mexican-Irish American immigrant, and raised by families heavily rooted in Catholicism on both my Mexican & Irish sides.

“I am deeply, deeply invested in projects that allow our youth’s voices to be heard, and that support our youth in owning their own complex narratives so that we can show up for them in the ways they need us to.”

Ramirez’s character on Grey’s Anatomy made history as the longest-running LGBTQ+ character on television, appearing in 11 seasons and 241 episodes.

They departed from the series in the 12th season, and went on to star in another queer role on Madam Secretary.

Related: 12 queer love stories that made TV history.