The Middleton family were also in attendance as they are spending Christmas with William and Kate at their current residence, Anmer Hall.

After the service, William and Kate chatted to well-wishers waiting outside the church.

The Duchess rugged up and covered her 5-month baby bump with a brown tweed coat we've not seen previously. 

The coat has been identified as the Moloh 'Turpin' coat. The piece is from their 2013 autumn/winter collection, so sadly it's not available to buy anymore. Below is a brief description of the coat as featured in February 2013 Belgravia Residents’ Journal.

This piece is Kate's second coat from the quintessentially British brand. During her first pregnancy with Prince George, Kate debuted the Moloh 'Workers' coat

Under Kate's coat, we got a glimpse of her Hobbs Animal Print shirtdress; the dress was first seen when the Duke and Duchess visited Wales in November. The dress has been reduced to £75.

Kate colour coordinated the long tweed coat with brown and gold toned accessories.

She wore her brown Lock & Co Betty 'Boop’ hat (£245).

Brown Cornelia James 'Imogen' pure wool gloves (£70).

Gold Catherine Zoraida Double Leaf earrings (£140).

Kate paired thick brown opaque tights with her chocolate brown Emmy 'Valerie' suede heels (£400).

The Duchess completed her look with a new scarf from Really Wild.  It is their 'Silk Scarf in Autumn Partridge' (£125). The scarf has been designed in-house and inspired by Game birds in warm, Autumnal colours.

SHOP KATE'S CHRISTMAS STYLE FOR LESS ...

The Duchess looked festive in her red Katherine Hooker 'Ascot' shift dress, which she debuted last month at the EACH fundraising drive.  Her outfit was very similar to the one she wore to last year's Christmas luncheon.

Kate wore her in a half-updo, revealing a pair of statement chandelier earrings. The costume earrings date back to 2007 and they have also been spotted on Pippa.

Kate also wore her Mappin & Webb 'Fortune' necklace.

SHOP KATE'S CHRISTMAS STYLE ...

Kate helped the young Scouts work on their Disability Awareness Activity Badge. Many of the activities were designed to educate the children on the challenges encountered by people living with disabilities. Activities included decorating a cupcake while blindfolded, trying to cut a chocolate bar while wearing boxing gloves, and trying to eat a piece of chocolate using chopsticks.

Kate opted for a casual ensemble for tonight's engagement, wearing the i.SCOUT Ladies Zip Print Hoodie in black (£28.00).

She paired the hoodie with black skinny jeans (most likely the Topshop Moto Leigh maternity jeans) and Russell & Bromley 'Charge It' boots (£275.00). 

Tonight, we saw the return of her KIKI 'Grace' White Topaz and Diamond Stud Earrings (£795.00) and Mappin & Webb Fortune White Gold Drop Necklace (£3,950).

The ceremony was held at Chelsea Old Church - situated on the same road where Kate previously lived at the former Middleton family home in west London.

The dress code for the wedding was obviously black tie with Prince William dressed in a tuxedo and Kate in her Diane von Furstenberg 'Zarita' black lace gown. The Duchess premiered the floor-length dress at the Royal Variety Performance last month.

The Duchess who is five-months pregnant with their second child wrapped up with her Really Wild claret red cashmere mix wrap scarf.  

The Duchess accessorised her long-sleeved lace dress with the recently identified Magid black beaded vintage clutch.

On her feet were black suede pumps. She debuted these last year at the Mandela film premiere and they were originally thought to be this pair by Prada. However, Prada denied it was this style and hence they remain unidentified.

In other news, Clarence House has announced that we will see Kate tomorrow when she attends a Beaver Scout meeting in Bow, London.  Kate will meet volunteers, leaders and help with activities before awarding badges to the Beavers.

The Duchess repeated her Jenny Packham ink blue silk tulle gown. 

She first wore it in October 2013 for the 100 Women in Hedge Funds Gala and in February 2014 at the National Portrait Gallery.

Kate again styled the gown with her Jimmy Choo Cosmic Platform Pumps (US$695).

However, tonight she premiered some serious bling.  She wore an exquisite jewelry set consisting of  emerald and diamond earrings and a matching bracelet. The chandelier style earrings feature three strands of white and yellow diamonds secured to a large emerald surrounded by diamonds.  The bracelet matches the motif of the earrings. The jewels are reportedly a private gift. 

William and Kate leaving the MET.

The Duchess was absolutely flawless on their final night in the Big Apple. It was the perfect ending to a successful visit. Farewell New York!

Catherine with British actor, Patrick Stewart.

The Duchess wore another black ensemble, her third during this 3-day tour.  She wore the Seraphine 'Vanessa' maternity dress (US$99). The A-line dress is rendered in a luxurious Ponte Roma fabric with a mockneck and full length sleeves. It featuring a curved empire line that defines the waist. 

Kate jazzed up the simple silhouette of this black turtleneck frock with her dazzling £49,000 Cartier Trinity necklace, previously worn in 2012.

She wore the same accessories as this morning's visit to the September 11 Memorial. 

SHOP KATE'S STYLE ...

Kate laid white roses at one of the two reflecting pools, the state flower of New York. 

The bouquet included a handwritten note from the royal couple. 

Kate and William where then given a tour the museum including the In Memoriam room, where photographs of nearly all of the victims line the walls. Joe Daniels, the museums’s chief executive and president, said of the couple: “Just looking at the faces – of the old, the young, every race, every color – [William and Kate] were struck by the breadth and the scale of the loss we suffered that day.”

Following the sober tour of the September 11 Memorial, Prince William and Kate made a visit to a youth development program, The Door and watched a performance from CityKids Foundation, which supports young people from disadvantaged backgrounds.  

For this morning's engagements, Kate wore Mulberry’s Double Breasted Coat in cerise, which provided a lovely contrast to the bleak New York weather.  The wool crepe coat features a double-breasted front with 6 horn buttons and flap front pockets. It retails for £1,500.

Kate recycled her accessories, wearing her Episode 'Angle' black suede pumps, Mulberry 'Bayswater' clutch and  Cornelia James Imogen gloves.

Once inside, Kate attended a briefing with the directors of the center, wrapped Christmas presents with volunteers, and attended an art class with the children.

Kate wore a new coat from British designer Goat Fashion. 

The mod style 'Washington' coat (£680) is made from heavy-weight black wool crepe. It has a classic swing coat shape and contrast nude tabs on the cuffs and back and decorative contrast enamel buttons.

The Duchess accessorized with her Mulberry 'Bayswater' black suede clutch and wore her trusty Episode 'Angel' black suede pumps.

She kept her jewellery subtle, wearing her Annoushka Pearl Drops and Kiki Diamond Hoop earrings and Cartier Ballon Bleu de Cartier Stainless Steel Bracelet Watch.

The Duchess finished the look with her Cornelia James merino jersey wool gloves with the side bow.

Tonight, Kate will join her husband, Prince William at a NBA basketball match in Brooklyn, where they will watch local team the Brooklyn Nets take on the Cleveland Cavaliers.