Lucinda Creighton says the Reform Alliance has the potential to expand - and has been approached by Independent TDs.
The group of Fine Gael rebels says about 1,300 people attended its conference in Dublin on Saturday.
They've previously said they may become a political party in the future but have no plans for it at the moment.
The group's most prominent TD Lucinda Creighton says the Reform Alliance isn't recruiting - but has room to grow in the future.