Emma Roberts oozed dark glamour at the Los Angeles premiere of "American Horror Story: Freak Show," in a floor-length Saint Laurent gown featuring intricate cutouts and a thigh-high slit.

We also love this pretty maxi dress that features a plunging neckline and intricate straps that play with shapes.

LBD: Check. Red lip: Check. Emmy Rossum proved less really is more at the Los Angeles premiere of "You're Not You," with a black Altuzarra cocktail dress, a flash of leg and a red mani to match her statement lip.

We also love this curve-enhancing Altuzarra dress that has a similar silhouette.

Dressing a baby bump doesn't mean you have to dial back the sex appeal. Case in point: Rosamund Pike's flowy Altuzarra dress came equipped with a thigh-high slit to add some sultriness to her "Gone Girl" premiere look in New York City.

This halter-neck maxi dress will get you a similarly body-conscious fit complete with a flirty slit.

Though she went through a whopping seven dress changes as a host of the ALMA Awards, we were particularly fond of her yellow-chartreuse number featuring a thigh-high slit and an unexpected pop of color.

This floor-length halter gown comes in the same unique color and features a draped slit that will help you turn heads.

Lea Michelle turned up the sex appeal at the Los Angeles premiere of "American Horror Story: Freak Show," in a velvet Cushnie et Ochs dress featuring a plunging neckline and a high-high slit.

Buy the ready-to-wear version with a slightly more modest neckline now: Cushnie et Ochs Velvet Dress.