United Kingdom, June 4 -- Meghan, Duchess of Sussex has paid tribute to her daughter Princess Lilibet on her birthday.

The former 'Suits' actress - who also has six-year-old son Prince Archie with husband Prince Harry - took to Instagram on Wednesday (04.06.25) to mark the "beautiful" tot's special day, and she also expressed her gratitude for fans who have sent birthday well-wishes to the youngster.

Meghan shared a previously-unseen black and white photo of herself and Lilibet embracing on a boat, a rare picture in which the youngster's face could be seen, and another of her cradling her daughter shortly after she was born.

She wrote alongside the photos: "Happy birthday to our beautiful girl!

"Four years ago today she came into our ...