Actresses Kelly Preston and Fran Drescher and Tv titan Oprah Winfrey have poured their hearts out to their pets in a new book to raise money for charity.

Photographer Robin Layton has compiled a collection of heartfelt tributes from celebrities to their pooches for A Letter To My Dog to raise funds for animal rights organisation The Humane Society of The United States.

Sharing her special bond with three-year-old Bear, who Preston rescued after the tragic death of her son Jett in 2009, the Jerry Maguire star writes, "You found me when I needed you most. I looked in your eyes and felt I'd known you before. I feel I know who helped guide you to us... Your sweetness helped heal my heart.

"Some say we rescued you... I think it was the other way around."

Also adding messages and photos of their furry friends are The Nanny's Drescher, who posed with her Pomeranian Esther, and Tv host Winfrey, who can be seen kissing her Golden Retriever Luke.

Actress Kristen Chenoweth, Kathy Najimy and Will Smith's daughter Willow also contributed to the book project.