Drew Barrymore half-sister Jessica dead at 47

Drew Barrymore's half-sister Jessica Barrymore was found dead in her car in National City, CA on Tuesday July 29, 2014. She would have turned 48 on July 31.

A woman who discovered Jessica Barrymore inside a car that was blocking her driveway said there were dozens of white pills scattered in the passenger seat and she had a SoBe energy drink between her legs.

Jessica Barrymore is the daughter of Drew's father, actor John Drew Barrymore, and his third wife.

Via ABC News:

Sources tell 10News that a woman who was found dead in a car in National City early Tuesday is the half-sister of actress Drew Barrymore.

The woman was found inside the car in the 900 block of Hoover Avenue at about 6 a.m. Tuesday.

National City police tell 10News the woman's cause of death is unknown, pending an autopsy.