Mitchell Marsh said on Tuesday he would be happy to captain Australia for as long as necessary as the all-rounder prepares to lead the Twenty20 and One-Day sides on a tour of South Africa.

Mitchell Marsh said on Tuesday he would be happy to captain Australia for as long as necessary as the all-rounder prepares to lead the Twenty20 and One-Day sides on a tour of South Africa.

Marsh is Stepping in for injured one-day captain Pat Cummins, while Cricket Australia are yet to decide on a long-term T20 captain following the retirement of Aaron Finch.

The 31-year-old will lead Australia in three T20 internationals and five one-day games against South Africa before the team travel to India ahead of the 50-Over World Cup.

Being named captain of the limited overs teams marks a year to remember for Marsh, who got married in April and shot a hundredth during the ashes when he was called up to the Test team.

"It's definitely been a crazy year. Add to that getting married, it's been a good year," he told reporters in Sydney.

"We'll come through South Africa and see how we do." I'm available as captain for as long as the team needs me. We'll see where this all ends.

Cummins, who also captains the Test team, is expected to join the squad ahead of the 50-overs World Cup in India, which begins in October.

Marsh said he probably wouldn't "try to reinvent the wheel" while captaining Australia for three one-day and five T20 races in South Africa.

"I think the most important thing I've learned about leadership is to be true to yourself," he said.

"Hopefully I'll be a good captain. If not, I won't be in office much longer. That's fine. I'm just looking forward to the opportunity.”

Marsh is looking forward to left-armed pace bowler Spencer Johnson pushing for a possible debut as a replacement for injured regular Mitchell Starc.

Young leg spinner Tanveer Sangha is also hoping for a debut.