Blake Lively pays tribute to former Gossip Girls co-star Michelle Trachtenberg, writes: "she was fiercely loyal to her friends and brave'

Blake Lively paid tribute to her Gossip Girls co-star Michelle Trachtenberg.

Actress Blake Lively paid a rich tribute to her Gossip Girls co-star Michelle Trachtenberg, who was found dead at her high end apartment in New York on Wednesday.

Blake Lively took to her Instagram stories and wrote a long note describing how Michelle was 'electricity' and that whatever she did was 200 %.

She posted a picture of the first day she met Michelle Trachtenberg on the sets of their hit show 'Gossip Girl.'

She wrote: "She was electricity. You knew when she entered a room because the vibration changed. Everything she did, she did 200%. She laughed the fullest at someone’s joke, faced authority head on when she felt something was wrong, cared deeply about her work and was proud to be a part of this community and industry as painful as it could be sometimes."

Blake Lively, who was seen as Serena van der Woodsen in the hit teen drama, called Trachtenberg a 'fiercely loyal' friend, brave, 'big, bold and distinctly herself.'

She also recalled the “yummy caramel smelling lipgloss” that Michelle wore on the sets "because she cared about the sweet details."

"She was a kind person, through and through. The world lost a deeply sensitive and good person in Michelle. May her work and her huge heart be remembered by those who were lucky enough to experience her fire," she concluded her note.

A representative for Trachtenberg confirmed the actress' death after police found her 'unconscious and unresponsive' in her New York home.

“It is with great sadness to confirm that Michelle Trachtenberg has passed away,” the statement from her rep stated. “The family requests privacy for their loss. There are no further details at this time.”

Paramedics pronounced her dead at the scene. No foul play was suspected and the New York Medical Examiner is investigating the cause of death, police said.

The New York City-born Trachtenberg also appeared in the 2004 teen sex comedy “EuroTrip,” she co-starred with Zac Efron and Leslie Mann in 2009's “17 Again” and played a murderous stalker and abductor on an episode of “Criminal Minds.”

For “Killing Kennedy,” the 2013 film in which she played the wife of Lee Harvey Oswald, around 80% of Trachtenberg’s dialogue was in Russian. She had learned the language from her mother growing up.

Other credits included supporting roles in the films “Mysterious Skin” in 2004 and “Black Christmas” in 2006. She also starred on the NBC medical series "Mercy" (2009–2010) opposite Taylor Schilling. More recently, she hosted the true-crime docuseries “Meet, Marry, Murder” on Tubi.