She has a brother (older) Asa, who is a college senior. Her mother is a painter and teacher, and her father, a computer consultant. At age six she began studying modern dance, and she still does it. At nine, she took an acting class at the Lee Strasberg Studio. In sixth and seventh grade she attendend the Professional Performing Arts School in NY. She likes spending time on her school studies, especially the humanities and science. She's also interested in surfing while living in Los Angeles. She lives in NY and has a cat named Fifi-Champion.

(1997) Chosen by "People" magazine as one of the 50 most beautiful people in the world.

She came to L.A. to be cast on a role in Schindler's List (1993), when she was discovered for the role in "My So Called Life". Spielberg finally gave her the role but she turned it down, because they weren´t willing to give her schooling in Poland.

Claire's acting career began with stage appearances off-off-Broadway, in productions of "Happiness," "Punk Ballet," and "Kids on Stage," in which she choreographed a solo dance piece. Among her television credits are "Law and Order," in which she plays a young model who kills her agent; "No Room For Opal," as Tyne Daly's daughter; and "The Coming Out of Heidi Leiter," as a gay woman's sister. Claire made her film debut at the age of 11 in the role of a molested child in "Dreams of Love," with Milos Forman as executive producer. She also appeared in a short film, "Thirty," created for fashion designer Geoffrey Beene; and in a film festival short, "The Pesky Suitor," with Sully Boyar and in the production playing the role of Beth in Columbia Pictures' "Little Women," with Winona Ryder and Susan Sarandon. Claire has just finished the film "Romeo and Juliet".

When she is not working, Claire likes spending time on her school studies, especially the humanities and science. She tries to keep up her interest in dance, and wants to continue with her new enthusiasm for surfing while she's living in Los Angeles.

(1996) Dating actor Matt Damon