Zodiac star Jake Gyllenhaal desperately wanted to prove he was a good uncle to new niece Ramona, but became overwhelmed when he attempted to change her diaper.

The star's sister Maggie gave birth to a daughter in October and he wanted to get the full experience of trying to care for her.

He explains, "I'm an uncle. It's great. It's amazing - except for the diaper changing, which I did once and will never go back to again until it is my own child. I wanted to try it out. I wanted to see what it was like. So she handed me my niece and I put her down on the changing table and I un-knotted her organic diaper. I really never knew, and I am naive, of course, but I never knew that it was orange. I have a very short gag reflex. So when I saw it (I started gagging). I (was gagging) and handed her back!"

- Jake Gyllenhaal pics
- Maggie pics

(This news article provided by World Entertainment News Network)