Peta Murgatroyd shows off her svelte post-baby figure as she enjoys date with fiancé Maksim Chmerkovskiy... before taking two-month-old son Shai to Dancing With The Stars studio

They celebrated the arrival of their baby son Shai at the start of the year. 

And Dancing With The Stars' Peta Murgatroyd and Maksim Chmerkovskiy took a break from parenting duties as they enjoyed a double date with Nick Viall and Vanessa Grimaldi in LA on Saturday night. 

New mother Peta, 30, showed off her svelte post-baby figure in a silky blue shirt dress, featuring a ribbon belt tied up at the waist.

New parents: Dancing With The Stars' Peta Murgatroyd and Maksim Chmerkovskiy took a break from parenting duties as they enjoyed a double date in LA on Saturday night 

New parents: Dancing With The Stars' Peta Murgatroyd and Maksim Chmerkovskiy took a break from parenting duties as they enjoyed a double date in LA on Saturday night 

The professional dancer, who is partnering The Bachelor star Nick in DWTS, teamed the sophisticated number with a pair of strappy black heels and a black Chanel handbag.

Wearing her blonde tresses down over her shoulders in a centre parting, she highlighted her glowing complexion with a dash of blusher and a rose-tinted lipstick.

Her fiancé Maksim, 37, dressed down for the date, teaming a black T-shirt with white jeans and trainers. 

New mum: The couple were later spotted with baby Shai at the DWTS studio on Sunday, in preparation for the season premiere on Monday 

New mum: The couple were later spotted with baby Shai at the DWTS studio on Sunday, in preparation for the season premiere on Monday 

The couple were later spotted with baby Shai at the DWTS studio on Sunday, in preparation for the season premiere on Monday.

Peta looked chic in an all-black ensemble, teaming wide-legged trousers with a T-shirt, while tying her tresses off her face in a bun.

She is set to marry Maksim this summer, after announcing their engagement in December 2015.

Ukranian-born Maksim revealed to ABC News: 'We have an amazing, amazing space on Long Island, Oheka [Castle]. It's going to be great.  

Glowing: Peta, 30, showed off her svelte post-baby figure in a silky blue shirt dress, featuring a ribbon belt tied up at the waist 

Glowing: Peta, 30, showed off her svelte post-baby figure in a silky blue shirt dress, featuring a ribbon belt tied up at the waist 

Invest in a classic Chane handbag like Peta

Sometimes the right accessory can make or break an outfit. In Peta Murgatroyd's case, it was her Chanel bag.

The quilted shoulder bag added a luxe finishing touch to evening ensemble featuring delicate sandals and a navy wrap dress.

This bag is a favorite among celebs, and it seems like rocking a Chanel bag is a right of passage once you enter Hollywood.

Sadly, this bag isn't available but you can click right to shop Chanel!

If your budget won't allow for such extravagant spending you can still get the look below from Rebecca Minkoff, Karl Lagerfeld and more.

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Double date: The couple were joined on their date night by Petra's celebrity partner Nick Viall and his fiancée Vanessa Grimaldi 

Double date: The couple were joined on their date night by Petra's celebrity partner Nick Viall and his fiancée Vanessa Grimaldi 

'I remember when I was passing by this castle when I first immigrated, and [I said] "That's where I want to have my wedding". 

He added: 'Now it's happening.' 

The couple were joined on their date night by Petra's celebrity partner on DWTS Nick, 36, and fiancée Vanessa, 29. 

The duo appeared to be in good spirits, with the Montreal-born beauty showing off her slender pins in a pair of racy leather lace-up trousers.

Meanwhile Nick went for a laid-back look, teaming a white top with jeans and a pair of desert boots.  

High spirits: The Bachelor stars beamed as they enjoyed a night out on Saturday

High spirits: The Bachelor stars beamed as they enjoyed a night out on Saturday

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