"Happy 40th Ms Moss," posted model Rosie Huntington-Whiteley along with a photo of Kate smoking a cigarette. "💋 #birthdaygirl #40 #KM #icon #QueenK #KateMoss."
"Kate day ❤" wrote singer Diana Vickers. "Happy birthday Kate Moss you bloody babe."
While social media websites buzzed with good wishes for the birthday girl, flowers and presents were arriving at her London home.
Although Kate was busy celebrating her milestone birthday on Richard Branson's Necker Island in the Caribbean, friends and fans were sure to leave her plenty of gifts to come home to.
One delivery man was seen arriving at the gated house with a huge bunch of silver star-shaped balloons, while two woman carried in a large silver bucket of roses. More presents arrived in bags from Hermes and Givenchy.
Kate is believed to be celebrating her birthday with her daughter Grace, her husband Jamie Hince and close friends including designer Sadie Frost, hairdresser James Brown, PR guru Fran Cutler and socialite Annabelle Nielson.
According to the Mirror, mum-of-one Kate decided to get away from the hype of the capital for her birthday.
"Kate didn’t want the fuss and bother of London and the drama and paparazzi that comes along with it," a source told the newspaper. "She's decided to celebrate in private.
"It'll be wild though," they added. "Guests have been told to bring fancy-dress clothing, party gowns as well as beachwear."