Steve Granitz/WireImage; Rebecca Sapp/WireImage
's newest role is that of a mother, but she'll also be something more for her new daughter, a former costar says.
"She'll be really attentive and really strong and she'll be a great role model," actress Rosario Dawson told PEOPLE at the Cinevegas Honorees Reception in Las Vegas on Friday. "She's very smart and I like that about her."
Dawson, who starred in Sin City
with Alba and was being honored at the movie festival with the "Half Life" award, said she has already congratulated the new mother, and called Honor Marie Warren "a beautiful little girl."
"I don't know what people think about her on the outside or what their impression is, but Jessica is very strong and a very powerful woman," says Dawson.
Alba, 27, and husband Cash Warren, 31, welcomed their first child
on June 7.
As for who will rule with an iron fist, Dawson says, "She'll probably be the disciplinarian more than Cash. I can definitely see that."