This comes just weeks after the sister of Paris Hilton, 40, announced she is expecting a baby boy. He will be her third child as she and James also has daughter Lily-Grace, age five.
She wore a strapless, form fitting black dress that ended below her knee. There was also a long satin train and she added black gloves for a very 1950s movie star look.
The author and sister of Paris Hilton wore a pretty pale pink gown that hid her baby bump well. The stunning number had a V shape as the fabric shone thanks to sewn in sequins and mini pearls.
Jamie Lee Curtis looked slender in a curve-hugging black mesh dress when she hit the red carpet at the Academy Awards on Sunday afternoon at the Dolby Theater in Hollywood.