1 / 24

"What To Expect When You're Expecting" - Los Angeles Premiere

Don't trip J.Lo!

Dripping in jewels and a plunging Lucia Hohan gown, Jennifer Lopez evokes old Hollywood glamour at the Los Angeles premiere of her film "What to Expect When You're Expecting" on Monday night.

Is there such a thing as below floor length? Aside from the dramatic neckline, J.Lo's full-length, nude-toned, fabric-full Grecian dress completely drapes her, falling well below her feet.

The 42-year-old fared well as she brought her 25-year-old boyfriend, dancer Casper Smart, who would have probably picked her up if she fell.

"What to Expect" opens in theaters this Friday.

'What to Expect When You're Expecting' LA Premiere

Jennifer Lopez, Cameron Diaz, Elizabeth Banks and more stars attend the Los Angeles premiere of "What to Expect When You're Expecting."