Although not officially confirmed, it has been reported in the Caribbean media that the trio will receive their honours from Governor General Dame Louise Lake-Tack during the lunch break. Prime Minister Baldwin Spencer and Leader of the Opposition Antigua Labour Party, Gaston Browne are also expected to be attendance.
It will take the number of West Indies cricketers with knighthoods to 11 and four Antiguans following Sir Vivian Richards.
Roberts represented West Indies from 1974 to 1983 and was part of the fearsome attack also comprising Michael Holding, Joel Garner and Colin Croft. He took 202 Test wickets at 25.61 from 47 Tests and 87 and 20.35 in ODIs.
Ambrose, who played from 1988 to 2000, claimed 405 Test wickets at 20.99 from his 98 Tests alongside 225 scalps in ODIs.
Richardson captained West Indies in 24 if his 86 Test, scoring 5949 runs overall including 16 centuries.