Jessica Biel is not an actor.
An actor ( often actress for females ; see terminology ) is a person who portrays a character in a performance . Jessica Claire Timberlake ( née Biel ; born March 3 , 1982 ) is an American actress . Biel began her career as a vocalist appearing in musical productions until she was cast as Mary Camden in the family-drama series 7th Heaven , for which she achieved recognition . In 1997 , she won the Young Artist Award for Best Performance in a Feature Film -- Supporting Young Actress for her role in Ulee 's Gold . She is known for her role as Erin Hardesty in The Texas Chainsaw Massacre ( 2003 ) .