With all of Hollywood mourning the shocking death of Robin Williams, 63, it's tempting to lose sight of the fact that there's a group of people who are suffering far more than the rest—the beloved actor's family.

Williams' wife, Susan Schneider, released an emotional statement yesterday sadly confirming that she was heartbroken over the loss of her "best friend," and early this morning, his only daughter, Zelda, posted an excerpt from Antoine de Saint-Exupery's The Little Prince on Twitter:

To further highlight the tragedy—and the pain Zelda must be feeling—the late actor's last Instagram post before his death was a sweet birthday message to her on July 31st:

"#tbt and Happy Birthday to Ms. Zelda Rae Williams! Quarter of a century old today but always my baby girl. Happy Birthday @zeldawilliams Love you!" Williams captioned the photo.

Williams was found dead in his house in Tiburon, CA yesterday. The Sheriff's Office Coroner Department is currently speculating that he committed suicide via asphyxiation, according to The Hollywood Reporter. Our thoughts go out to Zelda and the rest of Williams' family during this truly terrible time.

[via Twitter]