The Min Woo Lee fandom has officially reached dress-up levels, but he still feels as if he's playing second fiddle to his world-beating sister.

The 25-year-old had fans at Royal Queensland in the palm of his hand on the way to a three-shot Australian PGA Championship victory on Sunday.

A brilliant chip-in eagle on the ninth set up a buffer and he made the most of it after a par on the 17th party hole.

Lee lives by the motto "Let Him Cook'", so he popped on a chef's hat and led a clap in front of 3,000 rowdy spectators before drilling his tee shot down the 18th fairway.

"I was pretty mature about when to do it and when not," he reflected on his crowd-pleasing moment on the 17th hole.

"On Saturday I high-fived 50-100 people and my hand felt a little weird on 18, so I didn't do that.

"I knew I had a few shot buffer and my chipping and putting was on point.

"I was pretty confident and it was time to do it. If I didn't do anything on 17, I would have felt like I missed an opportunity."

Across four days fans clamoured to witness Lee's swagger, many wearing shirts or hats adorned with the slogans that have garnered him 355,000 Instagram followers and led to conversations with NBA superstar Steph Curry.

"The chef hats and shirts were a new thing," he said.

"It's one of the best places to play, the supporters are unreal.

"I was looking up to Scotty (Adam Scott) and those big Australian names, hopefully I can do it for the kids coming up."

Lee's win came hot on the heels of sister Minjee's record third Greg Norman Medal on Tuesday.

The two-time major winner has 10 LPGA titles to her name and will line up in the combined Australian Open in Sydney from Thursday.

The pair made history when they won within a week of each other earlier this year.

"Everyone knows she's good and I'm slowly becoming a name for myself," he said.

"Every time I win it seems like next time she wins.

"So if I win next week or she doesn't, it'd be nice to have that for the New Year's break for a few weeks.

"She's one of a kind. A really great golfer and she's not slowing down."