The Knights would be severely depleted if the overseas players end up missing the tournament.
All three of Karthik, Russell and Narine had a good laugh during the friendly chat.
Uthappa said that Gambhir brought about a sense of security within the group.
KKR won the IPL twice under Gambhir's leadership.
KKR will also be helping out the needy and underprivileged.
Wednesday marked the eight-year anniversary of KKR's maiden IPL title.
Sunil Narine is playing for the KKR since IPL 2012.
Robin Uthappa recalled KKR's party after winning the 2014 IPL.
Venky Mysore feels technology will play an important role if IPL 2020 happens.
Cummins is excited to be part of the KKR again.