Farrell took part in the event to raise money for Debra, the national charity supporting people living with epidermolysis bullosa.

The actor is running the Irish Life Dublin Marathon, with Emma Fogarty, who has the condition epidermolysis bullosa, joining him for the final 4km.

The actor has launched the Colin Farrell Foundation to help adult children with intellectual disabilities like his son’s.

Farrell’s son James, 20, has the rare neurogenetic disorder, which causes problems with development, speech and movement.

The 32-year-old will leave Saracens after 15 seasons to move across the Channel after agreeing a two-year contract