Actress Ku Hye-sun abruptly quit her latest TV series, "You Are Too Much," which started airing early this month.

With just a few episodes having been broadcast, Ku has been forced to drop out due to ill health.

"Ku is currently hospitalized after developing a severe allergic reaction. She is in need of total rest and long-term care," Ku's agency YG Entertainment said Friday.

Ku was diagnosed with anaphylaxis, a potentially life-threatening condition often triggered by allergens. Its symptoms include difficulty breathing, dizziness, nausea, and collapse.

She was replaced in her role by actress Jang Hee-jin.

