Kallis, who was named in the ICC Hall of Fame in 2020, is South Africa's most prolific Test batsman and with 45 centuries in the format, is second only to Sachin Tendulkar in the all-time list for most hundreds.
Kallis, who retired from Test cricket in 2014, has performed coaching roles with various teams. Notably, he was South Africa's batting coach during the 2019/20 season when England visited.
Head coach Chris Silverwood and assistant coach Paul Collingwood will also be joined by former New Zealand spinner Jeetan Patel as spin bowling consultant, while Jon Lewis (bowling coach), Carl Hopkinson (fielding coach) and James Foster (wicket-keeper consultant) complete a seven-man coaching team heading out to Sri Lanka.
England are set to leave for Sri Lanka on 2 January and will play the hosts in two Tests, as part of the ICC World Test Championship, between 14-26 January.
(Except for the headline, this story, originally published by icccricket.com has not been edited by SLM staff)