Action Chapel International (ACI) is a Charismatic Christian church based in Accra, Ghana.

The church was founded by Nicholas Duncan-Williams in 1979, and since 1992 has met in the "Prayer Cathedral" near Accra airport.

Since 1992 Action Chapel International has met in the imposing "Prayer Cathedral" near Accra airport, although the building was not opened officially until 2002 and as of 2003 was still under construction.

[1] The 8,000-seat Prayer Cathedral of Action Chapel International on Spintex Road is the largest church building in Accra.

[3] As of 2015 Duncan Williams was still head of Action Chapel International, and was also chairman of the National Association of Charismatic and Christian Churches (NACCC).