Ireland's perennial champion trainer could have as many as three runners in the Flemington showpiece on November 7, with 2015 runner-up Max Dynamite and Wicklow Brave, who disappointed in last year's renewal, also in contention.
Patrick Mullins, assistant to his father, said: "It's magic that someone with his experience wants to ride Thomas Hobson - it's a big endorsement of his chances.
"He went very close to winning the race on Tony Martin's horse and it's great to have him on board."
Mullins confirmed Wicklow Brave could first contest the Caulfield Cup on Saturday week.
The Melbourne Cup hopefuls are part of a four-strong team for Closutton in Australia, with Riven Light the first to run in Saturday's Group One Ladbrokes Stakes at Caulfield.
"David Casey is down there with the horses and he's happy with how Riven Light is working," Mullins added.
"There's some great prize-money on offer and it will be interesting to see how he measures up to Australian horses."