Nicky Hilton attends J Mendel's show
Nicky Hilton waves as she arrives at the 26th Carousel of Hope Ball in Beverly Hills, California, Oct. 20, 2012. She married banker James Rothschild Friday at Kensington Palace in London Friday. Reuters/Fred Prouser

Nicky Hilton showed off her growing baby bump in a blue lace dress at J Mendel’s presentation at the New York Fashion Week Thursday. The hotel heiress and designer sat front row to watch the show which marked the end of NYFW. The 32-year-old is expecting her first child with husband James Rothschild.

For the first time since it was announced that Nicky was pregnant, the designer flaunted her baby bump on the red carpet in a form-fitting blue dress. Nicky’s dress is from Mendel’s Fall/Winter 2016 collection. The knee-length dress featured panels of blue steel in cotton-blend lace layered over organza.

The sheath dress also featured a slit at the hemline, semi-sheer short sleeves and a high neck. Nicky showed off her toned legs and arms in the dress. She paired her outfit with a pair of nude high heels and draped a matching long coat over her shoulder.

Nicky carried a small black bag while her make-up was flawless with a hint of black eyeliner and mascara. She wore pink lipgloss and flashed her black manicure. She accessorized with pearl earrings and her engagement ring.

Her straight long blonde hair was left loose over her shoulders in a sleek side parting and was tucked behind her ears.

A source told People in January that the hotel heiress was pregnant with her first child with her banker husband James Rothschild. Meanwhile, Nicky’s sister Paris Hilton, 35, told during the amfAR Gala in New York last week that she can’t wait to become an aunt. “(Nicky) is so tiny right now, you can’t even tell (she's pregnant). Usually you can tell with the size if it’s maybe a boy or a girl, but we have no idea – and they want it to be a surprise,” said Paris, speaking to People.

Nicky and her British banker husband James tied the knot at The Orangery in Kensington Palace in July. The beautiful bride stunned in a bespoke Valentino ivory lace dress.