Zelda Williams has paid tribute to her father Robin Williams, who passed away yesterday (August 11), aged 63.

The 25-year-old actress posted an excerpt from French poet Antoine de Saint-Exupéry's El Principito, along with the message: "I love you. I miss you. I'll try to keep looking up. Z".

Robin Williams posted a baby photo of his daughter two weeks ago on Instagram to mark her 25th birthday.

He wrote alongside the picture: "#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!"