Does Irresistible Have a Post-Credit Scene?

Yes, there are extra scenes during, or after, the end credits of Irresistible.

As the credits begin there are half screen faux news programme about the reporting of the events in the film.

Then there are just credits for a minute when a window opens and Trevor Potter (Former Chairman of the Federal Election Commission and President of Campaign Legal Centre) appears talking about whether or not the events shown in the film could actually happen. When this is over there is nothing else but there's only fifty seconds left anyway.

The credits run for approximately 6 minutes.