It's not every day you get to chat with one of the Gleeson Dynasty, but on this morning's show, Ian had some fun with Domhnall.
The Hollywood A-lister stars in the new movie Peter Rabbit, which is a 3D live-action/computer-animated comedy based on the famous stories by Beatrix Potter. He plays the character Thomas McGregor.
Ian asked him all about the part, and how he found the whole CGI process. They also chatted about how Domhnall's wise role selections have paid off, how he has been immortalised with a very impressive piece of merchandise, and his next project - a Lenny Abrahamson Irish horror.
We also learned of his love for Oasis, and how a recent meeting with one of the Gallagher brothers didn't go exactly as planned.
You can listen to the interview in full by pressing play in the image above the headline.