Babylon 5 and Lost actress Mira Furlan has passed away at the age of 65 on Thursday.
A cause of death is yet to be given.
Her official Twitter account confirmed the news, sharing a date of her birth and the date of her death along with a picture of Mira laughing.
The post also included a quote from Furlan, who was originally from Croatia, which read: "I look at the stars. It's a clear night and the Milky Way seems so near. That's where I'll be going soon.... I am not afraid.
"Let me close my eyes and sense the beauty around me. And take that breath under the dark sky full of stars. Breathe in. Breathe out. That's all."
Creator of Babylon 5, J. Michael Straczynski retweeted the post as he took to social media to share his own tribute to the actress.
He wrote: "It is a night of great sadness, for our friend and comrade had gone down the road where we cannot reach her.
"But as with all things, we will catch up with her in time, and I believe she will have many stories to tell us, and many new roles to share with the universe."
The show creator also revealed that he had known that Mira had been in poor health recently, but that he had hoped that she would soon improve.
He added: "Mira was a good and kind woman, a stunningly talented performer, and a friend to everyone in the cast and crew of 'Babylon 5,' and we are all devastated by the news.
"The cast members with whom she was especially close since the show's end will need room to process this moment, so please be gentle if they are unresponsive for a time. We have been down this road too often, and it only gets harder."
Fans also rushed to share their condolences, with one writing: "To Mira's friends and family. I cannot express how big an impact her role as Delenn had on me. I cannot imagine a world with her. My sincerest condolences."
Another agreed: "That's how I feel--I can't imagine Mira being gone. She mattered to me, even though she never knew I existed. I'm so sorry for this loss we share."
A third posted: "I am so utterly saddened by this news. My deepest condolences to Mira's family and friends. She was an inspiration to me."
Mira is survived by her Serbian filmmaker husband Goran Gajić and and their son, Marko Lav Gajić.
The actress was born in the former Yugoslavia and emigrated to the US back in 1991, before being cast as Delenn in Babylon 5 two years later.
She stayed on the iconic show for five seasons until it came to an end in 1998.
Mira was then cast as Danielle Rousseau in Lost in 2004, and appeared in 25 episodes until 2010.