In 2000 she married Scott Foley (who played her love interest on the television show Felicity, where she had a recurring role) but separated and subsequently filed for divorce in 2003. Jennifer has been linked romantically with her 'Alias' co-star Michael Vartan and her 'Daredevil' co-star Ben Affleck.

Early in the filming of Daredevil (2003), while doing a stunt, she became tangled in the wires that were helping her do a flip and she nearly crashed into a wall that she was supposed to flip off. Ben Affleck, in his Daredevil costume, rushed up to her, grabbed her, and pulled her away from the wall before the accident could happen.

Graduated from George Washington High School in Charleston, WV. Was going to go to Yale to study drama but got an acting job in New York City instead. Graduated from Denison University, Granville, Ohio, with a Theatre degree in 1994.