By Mona Buehler

Chris O'Donnell brings a quiet intensity to his work on NCIS: Los Angeles, but when not playing "G" Callen on CBS' longtime hit drama, the actor is all smiles and laughs on the Emerald Isle.

Watch photographed the beloved actor at the legendary Ashford Castle in County Mayo, Ireland for our March-April 2013 issue. Here's a look back at his lucky adventures.

NCIS: Los Angeles airs Sundays at 9/8c on CBS. Stream anytime on Paramount+.