Pregnant Katharine McPhee, 36, debuts her blossoming bump in a black top and leggings as she steps out with husband David Foster, 70, to go baby shopping in Montecito

They're expecting their first child together after tying the knot in June last year.

And Katharine McPhee looked radiant as she showed off her blossoming baby bump for the first time in a long-sleeved black top and leggings on Tuesday. 

The actress, 36, appeared to be in good spirits as she went baby shopping while out for lunch with her husband David Foster, 70, in Montecito, California. 

Bumping along! Katharine McPhee looked radiant as she debuted her blossoming baby bump during a lunch and shopping trip to Montecito, California, on Tuesday 

Katharine kept things casual for the outing, donning comfortable sportswear which covered her growing stomach.

She kept her accessories to a minimum, but did don some sunglasses and a face mask as well as wearing her cute dog in a light grey sling across her body.

The brunette beauty tied her long tresses back into a low ponytail and added a navy blue baseball cap to complete her ensemble.

David also cut a relaxed figure in light denim jeans and a t-shirt, with the record producer opting to match his wife with a similar choice of hat. 

Parents-to-be: The actress, 36, and her husband David Foster, 70, appeared to be in good spirits on the outing

During the outing David was seen browsing real estate magazines while waiting for their table at dining spot the Honor Bar.  

While mom-to-be Katharine passed the time by browsing baby stores, leaving The Nurture Cottage with a large white shopping bag full of purchases. 

MailOnline has contacted Katharine's representatives for comment. 

It comes after the couple enjoyed a cosy double date with Prince Harry and Meghan on Tuesday night to celebrate the news over dinner in Montecito, California.  

The couple were married at the Armenian Church of St Yeghiche in South Kensington, London, on June 28 last year. 

Baby shopping: Katharine was seen toting a white shopping bag after popping into store The Nurture Cottage

Blossoming: She covered her growing stomach in a comfortable black long-sleeved T-shirt

Getting ready: The star was seen coming out of the shop which had children's clothes in the window

Fur baby: Katharine carried her cute pup in a grey sling for the stroll around in the sunshine

Happy news: The couple's pregnancy was revealed on Thursday

This is the first child for Katharine and the sixth for David Foster, 70.

News that the 36-year-old actress is pregnant with the 70-year-old record producer's child was confirmed by People's sources on Thursday.  

Foster has five daughters and has been married five times: to B.J. Cook, Rebecca Dyer, Linda Thompson, Yolanda Hadid and McPhee.

His first child, Allison Jones Foster, 50, was born when David was just 20-years-old and was subsequently placed for adoption, with the Grammy winner reconnecting with her 30 years later.

Taking a moment: They appeared to be in good spirits as they sat down and checked their phones

Happy: Katharine beamed a smile as she held her phone to David's ear

Comfort first: She opted for light grey leggings which ended just above her ankles and black trainers

Growing family: The baby will be Katharine's first child and David's sixth

New role: The baby will be Katharine's first child and she looked radiant during her stroll 

Relaxed: David also opted for a casual ensemble in light denim jeans and a navy T-shirt

Staying safe: Katharine and her husband both donned face masks

Foster's first marriage to singer-writer Cook produced a daughter named Amy Skylark, 47, while his second marriage, to Dyer, produced daughters Sara, 39, Erin, 38, and Jordan, 34. 

McPhee was previously married to Nick Cokas from 2008 - 2016. 

It was revealed back in August that David and Katharine were 'definitely trying' to have a baby, according to Us Weekly's sources. 

David's daughters Sara and Erin previously told the outlet that they 'fully expect to have a child and fully support '.

Erin said, 'Anything that makes them happy, I’m happy with.'

Getting ideas? The music producer browsed a real estate magazine while he relaxed outside the restaurant

Chilled out: David soaked up the down time while his wife shopped

Mama: The actress and singer covered some of her blossoming bump with the dog sling

Quality time: The couple, who married in London in 2019, appeared to be soaking up the time together as they strolled around the area 

Listening closely: David appeared appeared to be concentrating hard as his wife put on an animated display

Pooch: Katharine's dog stuck one paw out of its sling as the couple approached their lunch spot

Mama-to-be: Katharine looked sensational as she showed off her bump for the first time since the pregnancy was revealed

Details: She kept her accessories to a minimum, only donning some stylish necklaces and sun glasses

Off they go: The pair appeared to be enjoying their lunch outing

Snoozing: Katharine's pup seemed to be enjoying an ear rub during the walk

The writer-performer also declared they were fans of their new stepmother, adding, 'we are making it clear that we love Katharine.'

McPhee and Foster were wed at the Armenian Church of St Yeghiche, South Kensington in London on June 28, 2019.

Meanwhile, McPhee recently resumed filming on her upcoming Netflix series Country Comfort.

Expecting! Katharine and David's baby news was revealed on Thursday (pictured in February)

Sweet: David's daughters Sara, 39, and Erin, 38, second right with previously told the outlet that they 'fully expect to have a child and fully support '

Ex appeal: David has five daughters and has been married five times: to B.J. Cook, Rebecca Dyer, Linda Thompson, Yolanda Hadid and McPhee (pictured with Hadid in 2014)

Last month the actress shared a photo of a masked table read with the cast, captioning it, 'and we're back!'

Another photo showed a monitor on set capturing her breaking into laughter with her co-star Eddie Cibrian.

The two were announced to star in the series in January, but production was halted in March due to the coronavirus pandemic.

Then I met you: The couple first met when Katherine was a contestant on season 5 of American Idol in 2006