Washington, Aug. 21 -- Kirsten Dunst has opened up about a frightening health scare involving her young son while she was working overseas.

According to PEOPLE, the 43-year-old actress shared in an interview with Town & Country that her 4-year-old son James developed a serious health issue while the family was staying in Budapest. Dunst was in Hungary filming Ruben Ostlund's upcoming project The Entertainment System Is Down.

Her husband Jesse Plemons and their two sons, Ennis, 7, and James, had joined her in January. The family settled into a rented house in Budapest, with their older son enrolled in a local school. But when James developed health problems, they decided to return to Los Angeles to be closer to loved ones.

Dunst, explai...