Pregnant Hilary Duff takes her daughters Banks, 5, and Mae, 3, out for lunch - after her husband Matthew Koma underwent a vasectomy

Pregnant Hilary Duff took her two daughters Banks Violet, 5, and Mae James, 3, out for lunch on Friday.

Hilary announced that she was expecting her third child with musician Matthew, also 36, and her fourth child overall in December. 

Luca, 12, is Hilary's first child and she shares him with her ex-husband Mike Comrie, a former professional Canadian ice hockey player. 

For lunch on Friday, Hilary took her girls to UOVO Italian Cuisine in Studio City, California and she looked stylish in black sunglasses, green trousers, and a black stretchy top and overcoat. 

Banks, five, wore a floral pink tracksuit and first-time big sister Mae, three, wore a fluffy pink coat with cheetah print leggings. 

Pregnant Hilary Duff, 36, took her two daughters Banks Violet, 5, and Mae James, 3, out for lunch on Friday - weeks on from her husband Matthew Koma's vasectomy

Pregnant Hilary Duff, 36, took her two daughters Banks Violet, 5, and Mae James, 3, out for lunch on Friday - weeks on from her husband Matthew Koma's vasectomy

Hilary announced that she was expecting her third child with musician Matthew (pictured) and her fourth child overall in December (far left is Luca, 12, whom she shares with ex Mike Comrie)

Hilary announced that she was expecting her third child with musician Matthew (pictured) and her fourth child overall in December (far left is Luca, 12, whom she shares with ex Mike Comrie)

For lunch on Friday, Hilary took her girls to UOVO Italian Cuisine in Studio City, California and she looked stylish in black sunglasses, green trousers, and a black stretchy top and overcoat

For lunch on Friday, Hilary took her girls to UOVO Italian Cuisine in Studio City, California and she looked stylish in black sunglasses, green trousers, and a black stretchy top and overcoat

It comes after Hilary's husband Matthew Koma revealed that he had undergone a vasectomy ahead of the arrival of their third child together. 

Matthew joked on his vasectomy operation day '10/10 would reccomend (sic)' as he took a selfie in his bandages and underwear. 

A vasectomy, or male sterilisation, is a procedure to cut the tubes that carry a man's sperm to permanently prevent pregnancy without further contraception.

Hilary announced her pregnancy exactly three months before with a series of Christmas cards. 

She wrote on the post: 'Surprise surprise!' and 'Buckle up Buttercups, we're adding one more to this crazy bunch' alongside photos of her existing children.

Hilary signed them 'The Duff, Bair, and Comrie Crew', as Bair is Matthew's real surname.

The star was swiftly inundated with well-wishes from her celebrity friends including Ireland Baldwin and Elle Fanning

The star married Matthew in 2019 after first striking up a romance in 2016 and briefly splitting in 2017.

Matthew joked on his vasectomy operation day '10/10 would reccomend (sic)' as he took a selfie in his bandages and underwear

Matthew joked on his vasectomy operation day '10/10 would reccomend (sic)' as he took a selfie in his bandages and underwear 

Hilary announced her pregnancy exactly three months before with a series of funny Christmas cards

Hilary announced her pregnancy exactly three months before with a series of funny Christmas cards 

She wrote on the post: 'Surprise surprise!' and 'Buckle up Buttercups, we're adding one more to this crazy bunch' alongside photos of her existing children (Bair is Matthew's real surname)

She wrote on the post: 'Surprise surprise!' and 'Buckle up Buttercups, we're adding one more to this crazy bunch' alongside photos of her existing children (Bair is Matthew's real surname)

She was married to Luca's father Mike, 43, from 2010 to 2016, after beginning to date him in 2007. 

Hilary had previously been keeping her bump under wraps as she stepped out in baggy sweaters before publicly announcing her pregnancy. 

Shortly after Banks was born, Hilary hit the headlines by revealing she had blended the placenta into a smoothie and drunk it.

In a more recent interview, she held forth to Women's Health about the way she feels about her body as a mother of three.

'I’m proud of my body. I’m proud that it’s produced three children for me. I’ve gotten to a place of being peaceful with the changes my body has gone through,' she said.

She noted that after she and her first husband split up she didn’t  know if she was going to have the opportunity to have another child.

Hilary went on: 'It was a whole mix of things - of being settled and realizing that I’m powerful and talented and smart. All mental things.' 

During the same interview she extolled the virtues of therapy, stressing the need to look after her emotional state as well as her physical condition. 

'We bust our a** to get our bodies in shape and to look the best we can. We get facials and Botox and our hair done and highlights and brows and lash lifts and all this s***,' the A Cinderella Story star revealed.

The star married Matthew in 2019 after first striking up a romance in 2016 and briefly splitting in 2017

The star married Matthew in 2019 after first striking up a romance in 2016 and briefly splitting in 2017 

She was married to Luca's father Mike, 43, from 2010 to 2016 and began dating him in 2007 (both pictured 2013)

She was married to Luca's father Mike, 43, from 2010 to 2016 and began dating him in 2007 (both pictured 2013)

'But I want to work on the inside. That’s the most important part of the system.'

On the professional front, Hilary recently saw the cancelation of her Hulu show How I Met Your Father, the Hulu spin-off of the beloved sitcom How I Met Your Mother.

Hilary shot to fame in 2004 for her role as the titular character in Disney Channel's Lizzie McGuire. 

She was in talks to star in a revival of the show, and former co-stars agreed to return, but the project was cancelled at the last minute due to a difference of opinion.