Beijing police today said they had placed Huang Haibo, 38, in "administrative detention" after they received a tip- off and caught him with the prostitute in a hotel here last evening.
He confessed to the illegal act, state-run Xinhua news agency reported.
Huang is the leading actor in a number of popular TV series, including "A Beautiful Daughter-in-law Era," a comedy about a modern Chinese couple.
Prostitution is illegal in China.
Earlier this year, the Ministry of Public Security demanded that the police crack down on prostitution and pornography.