Winnie Harlow and Heidi Klum are joined by Robert Irwin for star-studded green carpet for Prince William's Earthshot Prize Awards in Cape Town

Winnie Harlow said she felt 'honoured' getting a royal letter for the event Glamorous guests have descended on Cape Town to join Prince William's Green Carpet at the Earthshot Awards. The star-studded event saw model Winnie Harlow posing for snaps on the green carpet, donning an elegant chocolate brown ensemble Earthshot Prize Ambassador and Host of Earthshot Week, Nomzamo Mbatha looked glamorous in a strapless pastel yellow frock Model Heidi Klum looked effortlessly fashionable in a tangerine one-sleeved frock 'I felt really honoured because I feel this should be something near and dear to everyone's heart when it comes to taking care of Mother Earth, the planet. The son of the late Steve Irwin, Robert Irwin, an Australian conservationist also looked in high spirits as he stepped out in a crisp tuxedo American actor and singer Billy Porter looked stunning in a monochrome suit Canadian actress Nina Dobrev turned heads in a red bardot gown Former South African rugby player Tendai Mtawarira looked dapper as he beamed for cameras in a bow-tie Diamond Platnumz posed topless with a crucifix around his neck, sporting a red crocodile-print jacket with a pair of blue jeans and cowboy boots Deputy President of South Africa Paul Mashatile attends the Earthshot Prize Awards The singer posed topless with a crucifix around his neck, sporting a red crocodile-print jacket with a pair of blue jeans and cowboy boots. Ndolvu Youth Choir attends the Earthshot Prize Awards at Green Point Shared Fields in Cape Town Alan Winde, Premier of the Western Cape turned up to the award in a dapper tuxedo South African rapper and television presenter Nomuzi Mabena looked chic in a black patterned dress Lebo M attends the Earthshot Prize Awards at Green Point Shared Fields in Cape Town William was speaking to the BBC and Sky News as he prepared to host his fourth annual Earthshot Awards designed to highlight and scale up the best solutions on the planet to the current environmental crisis.