PRINCE Charles had a unreal moment with a fashion model at the Museum of Contemporary Art today.

There to support The Campaign For Wool, Prince Charles couldn't help but be distracted by live models displaying garments by some of Australia's top fashion designers.

Model Bec Bisset - wearing an Akira Isogawa design and holding a toy sheep - caught the Prince's eye and he even took a detour to speak with her.

"He said, 'I didn't realise you were real' - he thought I was a mannequin," she said.

"But I said, 'The sheep isn't real'.

"He asked me about my clothes, whether they were warm and comfortable and he also asked who designed them."

Prince Charles himself was dressed in a navy suit made of Australian Merino wool from Tasmania and designed by tailors Anderson and Sheppard in the UK.

The Campaign For Wool was launched globally on Australia Day 2010 in an effort to support struggling farmers.

Today, Prince Charles was greeted with an enthusiastic crowd and a cheeky message from the P&O cruise ship moored in Circular Quay right outside the MCA.

The large banner declared "Royal Suite Available".

As part of his visit, the prince met with designers Josh Goot, Dion Lee, Kym Ellery, Camilla Freeman-Topper and Isogawa.

Southern Highlands Christian School student Brooke Pearce won a meet and greet with Prince Charles thanks to her own fashion design using Australian wool.

"He was pretty casual so it made it a lot easier on me - I was so scared," she said.

"When he came up he was quite calm so that made me calm."