Taylor Lautner's Muscles Makes Former Costar Kristin Davis 'Feel Protective'

As a member of the "Sex and the City" foursome, Kristin Davis (who as we all know by now plays happy-go-lucky Charlotte) has had her fair-share of hot male costars. However, her hottest yet may have only been 13-years-old when she worked with him.

We're, of course, referring to 2005's "The Adventures of Sharkboy and Lavagirl 3-D," in which Mrs. York-Goldenblatt played the mom to a son who imagined Sharkboy, played by Taylor Lautner. The fact that Taylor's since skyrocketed into major heartthrob status — thanks to "Twilight," duh — has Kristin blushing just a little. "He was a kid [when we were filming] and he didn't have those muscles, and I don't know what happened," she told MTV News' Josh Horowitz during a recent office visit. "I see these pictures [now and] I can't believe it."

In between inserting the old adage, "They grow up so fast," the actress had nothing but good things to say about Taylor's professionalism. "[He was] nothing of those negative things that you think of with child actors. So for anyone to be succeeding, I'm happy for him," she exclaimed. "I'm just a little ... I feel protective, like what is he doing without his shirt on? And then I hear he's dating people and I'm like, 'Ahh!' " Press play above to hear Kristin gush even more about Jacob!