There will be no more excited owner than Brisbane lawyer David Cameron when he has his first Group One runner in four decades at Doomben.

He is a part-owner of three-year-old Divine Centuri who is the most inexperienced runner in the Doomben 10,000 on Saturday, having won four of her six starts.

Cameron is adamant trainer Stuart Kendrick wouldn't be running Divine Centuri if he thought the filly couldn't cope with the occasion.

"He has looked after her and wouldn't push her unless she was ready," Cameron said.

"Win, lose or draw it is an exciting day. It is what racing is all about."

Cameron is equally well known in rugby union circles and his first good horse was Aquataine who he raced with then Wallabies Paul McLean, Chris Handy, Andrew Slack and San Pilecki.

"She is the best horse I have had to date and won five races at Eagle Farm. But Divine Centuri will take that mantle on Saturday," he said.

"I have had a few since Aquataine with my friends but nothing like Divine Centuri."

In a coincidence, Cameron was introduced to racing by his friend Tom Clarke who races Villiers Stakes winner Rudy with his brother Don and David.

"Tom and I were at the same college at University when I was studying law in the early 1970s. Tom's family had horses with (trainer) Ron Conquest and I got involved," Cameron said.

"I used to help a bit around Ron's stables while I was still at uni."

Rudy is one of the favourites for the Premier's Cup on Saturday.

"It was great fun when Rudy and Divine Centuri won at Doomben two weeks ago. But it might be a bigger party if they both win on Saturday," Cameron said.