Faf du Plessis says AB de Villiers has already held discussions over a potential South Africa comeback.
De Villiers retired from international cricket in May 2018, stating he had "run out of gas".
New Proteas head coach Mark Boucher said it would be remiss of him not to try to tempt one of South Africa's greatest batsman to have a change of heart, with the T20 World Cup on the horizon next year.
South Africa captain Du Plessis revealed talks with the 35-year-old started a few months ago.
"People want AB to play and I am no different," said Du Plessis, speaking to reporters after playing for Paarl Rocks against Tshwane Spartans in the Mzansi Super League final.
"Those conversations have been happening for two or three months already: What does it look like? How does it look over the next year? And that's where it starts.
"T20 cricket is a different beast, it's not a lot of time away from home. If you are a full campaigner, you have to really get stuck in and spend a lot of time on the road.
"Test cricket now is the most important thing but also the T20 World Cup is not too far away and there isn't a lot - I reckon 20 T20s over the season - which won't be that hard on one to do that.
"Those conversations have already taken place and will continue to before the next T20 series starts."
De Villiers is set to make his Big Bash League debut for Brisbane Heat next month.