Jessica Barrymore, the half-sister of actress Drew Barrymore, was found dead early Tuesday in what appears to be a suicide.

Her body was discovered in National City, Calif. when a woman investigated why Jessica's car was blocking her driveway.

The deceased was found unresponsive and reclined in the driver's seat with an energy drink between her legs and dozens of white pills scattered around, a local ABC affiliate reported.

Drew released a brief statement shortly after the news broke. "Although I only met her briefly, I wish her and her loved ones as much peace as possible, and I'm so incredibly sorry for their loss." The mother-of-two and Jessica shared the same father, actor John Drew Barrymore.

Her shocking death comes only two days before her 48th birthday on July 31. In one of her final Facebook posts, Jessica shared this cryptic message from Mystera Magazine:

An autopsy to determine her cause of death has yet to be scheduled.