Yet if they take a page out of the book of the likes of Angelina Jolie or Jessica Alba, they might realise that there's a lot more to navigating Hollywood than just looking pretty.
That's not to say Jolie and Alba aren't two of Hollywood's most beautiful actresses. They're just two of the smartest - and two of the fittest.
In fact, now happily married to film producer Cash Warren, the 29-year-old mother of Honor, 2, is proud to have played a Mexican action heroine in her first Latina role.
"I have always been attracted to strong, powerful women, like in Aliens, Terminator, Nikita and even The Professional, Natalie Portman's character," says Alba, who was born in California to a Mexican-American father and a mother who is of French and Danish descent.