Mr Cameron said he was committed to working with the UUP
Conservative Party leader David Cameron is to address the Ulster Unionist Party conference in December.
Last week the two parties entered into an electoral pact which will lead to them fielding joint candidates in European and general elections.
Mr Cameron said the agreement would allow everyone in Northern Ireland to participate fully in political life throughout the United Kingdom.
"My attendance proves my commitment to this new political force," he said.
The Ulster Unionist leader, Sir Reg Empey, said he was "delighted" that Mr Cameron was attending the conference.
"It is a very clear signal that the relationship between our parties is improving and that the campaign to promote a UK wide pro-Union philosophy is gathering pace.
"David Cameron will be a very welcome visitor," he said.