HONG KONG - Oscar-winning director Ang Lee played an important role in "The Hangover Part II" - at least offscreen. He is the father of one of the actors.

The filmmaker's younger son, Mason Lee, plays Teddy, the teenager the lead characters try to rescue as they struggle to piece together what happened during a crazy night in Bangkok.

Ang Lee was clearly a proud dad speaking to reporters after catching a showing with his younger brother and mother earlier this week in Taiwan, his home country.

"My son's performance was quite good," Lee told reporters outside a Taipei theater in footage posted on the website of the Taiwanese newspaper Apple Daily. "He is quite a serious actor, but this is just a comedy."