"Quick, powerful and really keen to learn, he has earned his place in this team and I look forward to seeing him in action in Dubai."
"I'm really excited about this new adventure with the Aussie 7s," Williams said in May after signing a contract with Rugby Australia through until 2021.
"I've always loved rugby and to be able to potentially chase an Olympic dream through rugby is something I never expected. I want to grab this opportunity with both hands."