3 Best Looks of Fashion Icon Kate Middleton the Duchess of Cambridge in 2013
Catherine, the Duchess of Cambridge, leaves following a screening of "David Attenborough's Natural History Museum Alive 3D" at the Natural History Museum in London December 11, 2013. REUTERS/Suzanne Plunkett (BRITAIN - Tags: ROYALS ENVIRONMENT ENTERTAINMENT)REUTERS

Kate Middleton recently exposed her tiny baby bump in an alluring outfit as she stepped out for a Charity Gala Dinner on 23 October. For her third appearance since the announcement of second pregnancy, the duchess chose a sexy knee length black dress from Temperly London's collection.

Middleton arrived for Action for Addiction dinner without Prince William and was seen waving to the crowd with a smile. Her black outfit, which had an visible nude slip, was reportedly inspired by stained glass iron work and costs around $960, according to US Weekly.

The 32-year-old Duchess was also seen with minimal accessories and a matching black clutch.

Middleton, who has been staying indoors for some time now due to extreme morning sickness (hyperemesis gravidarum), was visibly excited at the event. Nick Barton, Chief Executive of Action on Addiction also acknowledged her presence and said that he was glad that she could make it to the dinner.

"It's been difficult for her, one appreciates that, so one appreciates her presence tonight even more. She loves talking to the people we actually help and she's so good with them and genuinely interested," said Barton, according to the website.

Middleton's second pregnancy was announced in September. Subsequently, she had to cancel a slew of public events, including solo visit to Malta island, due to her health condition. Her husband Prince William had to take her place.

The duchess resumed her royal duties when she along with Prince William went to greet the President of the Republic of Singapore and his wife Mary on 12 October. She was seen in a grey Alexander McQueen dress and Jane Taylor headpiece, at her first appearance after the announcement of her pregnancy before spotted in a blue dress from Jenny Packham at the Wildlife Photographer of the Year 2014 awards ceremony.

Middleton is due in April 2014 and her condition is said to be steadily improving. Meanwhile, she will be celebrating Christmas for the first time at her countryside residence, Anmer Hall, according to reports. The refurbishment process of the home is almost over.