The EEA Family Permit is available to all family members of EEA nationals who are exercising EU treaty rights.
It applies to anyone applying to join or who are intending to accompany their EEA National family member to UK.

As an Irish Citizen you are an applicable EEA National providing you are not also a British Citizen.

The visa is free. No risk at all. Decisions are very quick.
Just review the links previously posted.