She played Jennifer Garner’s best friend (in 13 Going on 30) and Jennifer Lopez’s confidant (in The Wedding Planner), but by the time you’re just one chapter into actress Judy Greer’s new book of essays, you’ll be wishing she was your real life bestie.

I Don’t Know What You Know Me From: Confessions of a Co-Star (amazon.com, $17) is a hilarious, heartfelt memoir, where Greer pulls back the curtain to reveal what it’s like being a “slightly recognizable but not immediately able to place” actress.

Reading her book is as if Greer herself is curled up on the couch next to you, pouring another glass of wine and telling you about her day. If we sound smitten, it’s because we are! It’s easy to fall in love with a girl who has a wickedly sharp sense of humor, understands that a trip to Walgreens can be more uplifting than a year’s worth of therapy, and will dish about which A-list celebs she’s peed next to (spoiler alert: one of them was a recent InStyle cover girl!).

Greer breezily doles out fun Hollywood anecdotes about having to borrow cash from Matthew McConaughey and what it’s really like to go to the Academy Awards.

The book, which debuted earlier this week, is quickly garnering praise from press and actors alike. “Whether or not you ‘know what you know her from,’ chances are you have seen Judy Greer in a movie, at least once in your life, and wanted to be best friends with her,” says friend and fellow cool-girl Rashida Jones. “The good news is that her book is just as honest, witty, and observant as she actually is. . . she candidly spills the beans and consistently entertains. So now is your chance—you too can be friends with Judy (sort of).”

I Don’t Know What You Know Me From: Confessions of a Co-Star is available now.