United Kingdom, May 15 -- Gwyneth Paltrow has hailed her daughter Apple Martin her "ray of sunshine" on her 21st birthday.

The 52-year-old actress had the girl along with son Moses Martin, 19, with her Coldplay frontman ex-husband Chris Martin and marked her daughter's milestone date with a series of photos and videos posted to her Instagram.

They were accompanied by the caption: "To the light of my life, my ray of sunshine, my hilarious, brilliant, best buddy. Happy 21st birthday!!

"You are exceptionally kind and utterly wonderful.

"I am incredibly proud of your strength and your intellect. Your goofiness and your big laugh. You are just the best. The absolute best.

"Thank god for you, Apple Martin. I cannot wait to see what this ne...