Former Indian skipper Dravid and retired Sri Lankan strokemaker Jayawardene, two of the biggest run-scorers of all-time, will join the likes of Australian coach Darren Lehman and the umpire Richard Kettleborough on a body which has a crucial say in playing matters.
The International Cricket Council (ICC) said Jayawardene and Dravid had joined the committee after Sri Lanka's Kumar Sangakkara and former India leg-spinner Laxman Sivaramakrishnan completed their three-year terms.
Anil Kumble, another former India leg-spinner, will remain as chair of the committee after being re-elected for a second stint, the ICC added in a statement after a meeting at their headquarters in Dubai.
The appointments come a day after Manohar, a former president of the Indian cricket board, was unanimously elected as the first independent chairman of the world's governing body.