By peoplestaff225
Updated June 23, 2007 04:05 PM

After 18 years of marriage to Marsha Garces and three children, Robin Williams, 55, has learned that he still has a lot to learn. The License to Wed star says those "I know it all" phases are temporary as his kids, Zachary, 24, from his first marriage to Valerie Velardi, Zelda Ray, 17, and Cody Alan, 15, always surprise him.

Cody is the one who challenges him the most.

As for Zelda, she’s a "very good" and "natural" actress who’s currently pursuing an acting career, as is Zachary, much to Robin’s surprise.

Source: MoviesOnline