Queen Elizabeth is also due to attend the inter-denominational service in Armagh later this month.
Its reported several Fianna Fail TDs are angry at the govnerment's decision to send two ministers to a church service to commemorate the partition of Ireland.
The Sunday Times reports that the TDS, who include Barry Cowen, Brendan Smith, Willie O'Dea and Niamh Smyth, say they're getting a backlash from constituents over the decision.
Foreign Affairs Minister Simon Coveney and the Fianna Fail government chief whip, Jack Chambers, are due to attend the event, which President Michael D Higgins has refused to attend.
Queen Elizabeth is also due to attend the inter-denominational service in Armagh later this month.
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