- Nicknamed Scout by her mother, after the To Kill a Mockingbird character, due to her tomboy disposition as a child.
- At 10, played Christopher Robin in a children's theater production of Winnie the Pooh.
- Acted with cousin Gwyneth Paltrow in a 1999 Williamstown Theater Festival production of William Shakespeare's As You Like It.
- Appeared in the 1999 video for Canadian rock band Our Lady Peace's "Is Anybody Home?"
- Made her TV series debut in 2000 on the short-lived WB drama Young Americans, playing the cross-dressing Jake Pratt.
- Big break came in 2003, when she was cast as Shane McCutcheon on Showtime's The L Word.
- Mary Zahn — Mother
- William Moennig III — Father
- Gwyneth Paltrow — Cousin
- Blythe Danner — Aunt
- Jake Paltrow — Cousin
- Bruce Paltrow — Uncle
- Hillary Danner — Cousin
- American Academy of Dramatic Arts, New York, NY
Season 4, Episode 1
- Birth Name: Katherine Sian Moennig
- Birth Place: Philadelphia, PA
- Birthday: December 29, 1977, Capricorn
- Profession: Actor