Lily Collins‘ new book has a very special fan.
The actress-turned-author, 28, took to Instagram on Monday, where she explained that after sending her book to Michelle Obama on a whim, the former First Lady recently sent back a sweet thank you note.
“Best way to start off my week!” Collins wrote, captioning a video of her reaction. “I can’t believe this letter I received from someone I deeply respect and admire. It’s absolutely epic. I’m in complete shock but just had to share!”
Collins read the note aloud before revealing it had been written by the former FLOTUS. The To the Bone actress was particularly excited that the letter’s envelope included a Wonder Woman stamp.
Addressed “Dear Lily,” Obama wrote, “I am writing to thank you for the copy of your new book. The gift was such a nice gesture and I look forward to sharing it with my daughters.”
She continued, “The outpouring of support I have received from women across the country continues to amaze me, and I am filled with a great sense of hope for our shared future.”
She then shared a quote she said reminded her of Collins’ book, writing, “Here’s to strong women, may we know them, may we be them, may we raise them.”
In her collection of personal essays, Unfiltered: No Shame, No Regrets, Just Me, Collins opens up about coping with troubled boyfriends, eating disorders, and her absentee father, musician Phil Collins.
This article originally appeared on People.com