Tragic Loss: Michelle Trachtenberg, star of 'Buffy' and 'Gossip Girl,' dies at 39

According to her public relations team, Michelle Trachtenberg, an American actor known for her roles in 'Buffy the Vampire Slayer' and 'Gossip Girl', died on Wednesday.

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

The cause of Trachtenberg's death is not known.

The actor was born to Jewish immigrant parents on October 11, 1985, in New York City.

As a child, Trachtenberg got her start in Hollywood in commercials when she was three years old. Her television debut was in the Nickelodeon series "The Adventures of Pete & Pete" in 1994.

FILE PHOTO: Actress Michelle Trachtenberg arrives for the annual White House Correspondents' Association dinner in Washington April 25, 2015. REUTERS/Jonathan Ernst/File Photo

At 10 years of age, she landed her first title role in the 1996 movie "Harriet the Spy."

She had roles in several Nickelodeon productions leading up to her being cast in the cult classic "EuroTrip" in 2004 when she was in her early twenties.

Then came the roles she is best known for, including the character Dawn Summers in the WB supernatural drama "Buffy the Vampire Slayer" in 2000 and as Georgina Sparks on the CW television series "Gossip Girl" in 2007.

Some of her other roles include the television films "Killing Kennedy," "Sister Cities," and the science fiction film "The Scribbler."

Trachtenberg also appeared in music videos from emo-rock band Fall Out Boy for their song "This Ain't a Scene, It's an Arms Race" and the Joaquin Phoenix-directed music video for "Tired of Being Sorry" by Ringside.