The Duke and Duchess of Cambridge attend the EE British Academy Film Awards at the Royal Albert Hall on February 18, 2018 in London, England.

The Duchess of Cambridge wore an emerald dress by Jenny Packham features a bardot neckline with cap sleeves and an empire waist that perfectly highlights her baby bump, attends the Bafta awards in London, England

Chief Executive of BAFTA, Amanda Berry (L), Britain's Prince William, Duke of Cambridge (R) and Britain's Catherine, Duchess of Cambridge (C) attend the BAFTA British Academy Film Awards at the Royal Albert Hall in London on February 18, 2018.

The Duchess of Cambridge, who is expecting her third child, was glowing in a dark forest green gown by British designer Jenny Packham, attend the EE British Academy Film Awards (BAFTAs) held at the Royal Albert Hall on February 18, 2018 in London, England.

Catherine, Duchess of Cambridge, wore an empire line dress in a deep shade of green by Jenny Packham, which was complemented by a dazzling emerald necklace and earrings. She accessorized with a black bow above her bump, matching her shoes and clutch handbag. As she joined her husband Prince William, Duke of Cambridge, who looked sharp in a black tuxedo, worn with velvet slippers, as they walked the red carpet at the Royal Albert Hall for the Bafta awards ceremony.

Catherine, Duchess of Cambridge wore Jenny Packham emerald gown, which was complemented by a dazzling emerald necklace and earrings. She accessorized with a black bow above her bump, matching her shoes and clutch handbag. Joined her husband Prince William, Duke of Cambridge, who looked sharp in a black tuxedo, worn with velvet slippers, arrived at the Royal Albert Hall for the EE British Academy Film Awards in London, England

Chief Executive of BAFTA, Amanda Berry (L), Britain's Prince William, Duke of Cambridge (R) and Britain's Catherine, Duchess of Cambridge (C) attend the BAFTA British Academy Film Awards at the Royal Albert Hall in London on February 18, 2018.

The Duke and Duchess of Cambridge were greeted as they arrived by Bafta chief executive Amanda Berry on left.  Prince William has been president of the British Academy of Film and Television since 2010.

Catherine, Duchess of Cambridge wore a dark forest green gown by British designer Jenny Packham, it features a bardot neckline with cap sleeves and an empire waist that perfectly highlights her baby bump. Beside her, Prince William, Duke of Cambridge, who looked sharp in a black tuxedo, arrived the BAFTA at the Royal Albert Hall in London on February 18, 2018.

Catherine, Duchess of Cambridge wore an empire line dress in a deep shade of green, which was complemented by a dazzling emerald necklace and earrings. She accessorised with a black bow above her bump, matching her shoes and clutch handbag.

The Duchess of Cambridge back detailed of her Jenny Packham emerald green gown which displayed a neat velvet black bow as she arrived the Bafta awards at the Royal Albert Hall

Chief Executive of BAFTA, Amanda Berry (L), Britain's Prince William, Duke of Cambridge (R) and Britain's Catherine, Duchess of Cambridge (C) attend the BAFTA British Academy Film Awards at the Royal Albert Hall in London on February 18, 2018.

The Duke and Duchess of Cambridge were greeted as they arrived by Bafta chief executive Amanda Berry on left. Prince William has been president of the British Academy of Film and Television since 2010.

Pregnant Catherine, Duchess of Cambridge's back view of her flowing Jenny Packham emerald gown, which displayed a neat velvet black bow, matching her shoes and clutch handbag, joined by Prince William, Duke of Cambridge and Amanda Berry, arrived the Bafta awards at the Royal Albert Hall

The Duchess of Cambridge wore a stunning Columbian emerald and diamond suite estimated to be worth £1million attend the EE British Academy Film Awards held at Royal Albert Hall on February 18, 2018 in London, England.

(L-R) Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge joined by Bafta chief executive Amanda Berry as they attend the BAFTAs held at Royal Albert Hall in London, England.

The Duchess of Cambridge wore a dark forest green gown, it features a bardot neckline with cap sleeves and an empire waist that perfectly highlights her baby bump, attends Bafta awards at the Royal Albert Hall

(L-R) Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, joins by Bafta chief executive Amanda Berry attend the EE British Academy Film Awards held at Royal Albert Hall in London, England.

The Duchess of Cambridge was glittering with a bright necklace, matching earrings and a chunky bracelet. Her hair was worn in loose waves around her shoulders, with a natural shine to her hair, as she made her red carpet entrance.