The Duke & Duchess of Cambridge were the guests of honour this evening at the Royal Variety Performance at the Palladium Theatre in London.

This is the third occasion William and Kate have attended the star-studded show in aid of the Royal Variety Charity, of which The Queen is Patron.

Their first attendance was in 2014, and they also made an appearance in 2017.

Tonight, Kate premiered a bespoke floor-length black lace overlay gown by Alexander McQueen.

Designed with a nude underlay that creates a sheer illusion, the gown is cut with a subtle sweetheart neckline trimmed with black velvet.

A look at the back of the dress.

The Duchess accessorized with her black Jimmy Choo 'Celeste' Velvet Clutch and the designer's 'Romy 100' Black Velvet Pumps.

Kate topped off the glamorous look with her Erdem Floral Hoop Earrings.

Today, The Duchess of Cambridge, Royal Patron of East Anglia’s Children’s Hospices (EACH), attended the charity’s celebration of its new Norfolk hospice, The Nook.

Five years ago Kate launched The Nook Appeal, which aimed to raise £10 million for a purpose-built children’s hospice which includes a hydrotherapy pool, state-of-the-art sensory room and music studio. Today the Duchess officially opened the facility.

The Duke and Duchess of Cambridge attended Shout UK's Crisis Volunteer celebration event in London today.

The thank-you party at Troubadour White City Theatre brought together people from across the UK who volunteer with Shout to support people in crisis.

Kate looked smart in cropped ruby red trousers and her Smythe check jacket. I have more outfit details below.

This morning, members of the royal family gathered for the annual Remembrance Sunday commemorations at the Cenotaph in Whitehall, London.  The Duchess of Cambridge attended the ceremony and watched the service from the Foreign Office central balcony alongside Her Majesty the Queen, and Camila, The Duchess of Cornwall.

Catherine debuted a bespoke piece from her go-to designer Catherine Walker. Cut with a high point collar and zip-up front, the tailored design incorporates military-inspired details.

The Duchess donned a new black Philip Treacy velvet hat with veil.

We saw the return of the Bahrain Pearl Drop Earrings, on loan from Queen Elizabeth II's royal jewellery collection.

Kate finished the look with a new poppy brooch in support of the Royal British Legion. It is The Codebreakers Brooch (£29.99) - a tribute to the work of those in signal intelligence.  The piece is inspired by the rotors of the Enigma machines, from which Allied cryptologists successfully decrypted a vast number of enemy messages during  WWII.  Kate's paternal grandmother, Miss Valerie Glassborow worked as a code-breaker during the war.

A view of Kate's elegant chignon.

Below is a look back at Kate's past outfits for this annual memorial event.

The Duke and Duchess of Cambridge attended the Festival of Remembrance this evening.

The Festival commemorates all those who have lost their lives in conflicts and it is usually attended by the Royal Family.  It is organized by the Royal British Legion and is held every year on the eve of Remembrance Sunday.

William and Kate joined the Queen, and other senior members of the Royal Family at London's Royal Albert Hall for the British Legion's traditional televised service.

The Duchess premiered a long sleeve dress with an a-line skirt falling just below the knee.  The dress features a wide bateau neckline and a waist defined with a black velvet band.

The designer is currently unknown but it's been suggested it could be a Jenny Packham creation because the silhouette appears to be identical to the black Jenny Packham 'silver fern' dress Kate wore to a State reception during the royal tour of New Zealand in 2014.

The Duchess carried a new black velvet minaudière this evening from Alexander McQueen.

It features a jewel clasp as seen on the designer's Mini Crystal-Embellished Leather Bag (US$2,190). ID by @GabiK_blogoKate.

On her feet, Kate wore her black velvet Jimmy Choo 'Romy' 100 pumps.

The Duchess donned a budget-friendly headpeice. She debuted a black Zara Sparkly Padded Headband (US$29.99). ID by @PackhamGown.

Kate wore her acorn brooch topped with three paper poppies - possibly one for each of her great-great uncles who were killed in the Great War.

She finished the look with the Queen's diamond stud and pearl drop earrings.

This is the fifth consecutive year Kate has attended the performance. Below we see her in 2015 wearing a black lace Dolce & Gabbana dress. In 2016 she wore the Temperley London 'Callas' evening coat and in 2017 she debuted a custom Catherine Walker coat. Last year she steeped out in a black Roland Mouret asymmetric neck dress.