Drew Barrymore was on hand for last night's Pirates & Princesses book party at Brooks Brothers in Beverly Hills. She has a special connection to the author of the kids' title, Jill Kargman, who happens to be her boyfriend's sister! Drew Barrymore and Will Kopelman were first spotting sharing PDA back in February, and last night at the celebration, Drew looked like part of the family as she cozied up to his young niece for pictures. The evening out came ahead of what promises to be a big weekend for the actress. It was just announced that Drew will be a presenter at the Emmys this Sunday, along with Gwyneth Paltrow, Jimmy Fallon, Katie Holmes, and a host of other Hollywood stars. Be sure to check out PopSugar at 3 p.m. PDT on Emmys day to watch our live, red-carpet coverage!