So long Sydney! Cameron Diaz jets out of Australia with Benji and Joel Madden... hours after dramatic finale on The Voice

With dust still settling on The Voice grand final, Cameron Diaz made a hasty departure from Sydney on Monday morning with Benji and Joel Madden.

The 43-year-old actress looked low key in a casual white sweater and skinny jeans as she walked between the two mentors ahead of a flight back to Los Angeles.

To her left, husband Benji looked equally relaxed in a signature black ensemble comprised of bomber jacket and jeans teamed with stylish black and white running shoes.

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They're off: Cameron Diaz and her husband, The Voice Australia coach Benji Madden made their way across Sydney airport ahead of a flight back to Los Angeles on Monday morning

The 36-year-old was joined by twin brother Joel, with whom he narrowly lost the Voice finale to coaching rival Jessie J and her teenage protégé Ellie Drennan. 

Ellie, at 16 the youngest person to win the show, brought the house down with a performance of debut single Ghost after beating final three contestants Liam Maihi - mentored by Ricky Martin - and Joe Moore and Nathan Hawes, both mentored by the Madden brothers. 

The pair are returning to Los Angeles amid claims that Cameron is expecting her first child with Benji, who she married in January. 

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In good company: The pair were joined by fellow coach Joel Madden for a flight back to the United States

A source told NW: 'It's no secret they've been trying for a baby for a while, and the fact she's flown out to be with him Down Under has everyone buzzing that it's finally happened.' 

The insider claims Cameron 'won't announce' the alleged pregnancy until she is in her second trimester but thinks she could be 'around eight weeks along.' 

On Sunday evening Benji commended Jessie on her coaching of Ellie telling the young singer that she 'really picked the right coach.'

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She's a winner: Ellie Drennan, at 16 the youngest person to win the show, brought the house down with a performance of debut single Ghost after beating final three contestants Liam Maihi - mentored by Ricky Martin - and Joe Moore and Nathan Hawes, both mentored by the Madden brothers

'Jessie you have really coached the hell out of her!' he said before also reminding the audience of her age, adding, '16, wow!'

However receiving raving reviews from all the judges Ellie wasn't so sure she had delivered herself. 

'I honestly can't believe I just won! This has been the most amazing experience,' she said after the big announcement was made. 'I am over the moon right now and thank you Jessie for always being there for me.

Benji Madden Proves That Chivalry Isn't Dead During a Sweet Outing With Cameron Diaz

Image Source: INFphoto.com

On Tuesday morning, Cameron Diaz and Benji Madden were spotted hand in hand leaving Bills restaurant in Bondi Beach, Australia. Like a true gentleman, Benji led the way as they made their way to their car, and he even stopped to open the door for his wife. Benji is currently in Sydney filming The Voice Australia, and Cameron flew in on Saturday to pay her rocker husband a visit.

This isn't the first time the happy twosome has displayed adorable PDA — after tying the knot back in January, the pair was caught on the kiss cam at a Lakers game. Then on Memorial Day weekend, Cameron and Benji sweetly embraced as they left a friend's house. Keep scrolling to see more cute moments from their outing, and then check out 23 famous couples who also walked down the aisle this year.

Benji Madden Wishes Wife Cameron Diaz a Happy Birthday: ‘I’m the Luckiest Guy Alive’

The 36-year-old Good Charlotte rocker wished his new wife Cameron Diaz a happy birthday on Monday by posting an adorable selfie with an even cuter caption.

WATCH: Newlyweds Cameron Diaz and Benji Madden Show Some Serious PDA Courtside

"Happy Birthday to my Beautiful Wife," Madden wrote. "My best friend and Everything else- there's so much I could write. I'm the luckiest guy alive- I get to spend the rest of my life right here. I love this Woman!! Many more Baby!!"

Madden and Diaz got married in January, and the musician has been smittenever since. In February, Madden got a tattoo of his wife's first name across his chest.

"Thinking bout you," he captioned a pic of the ink. "#LuckyMan."

MORE: Benji Madden Sends Love Messages to Cameron 'Bae' Diaz on Instagram

Diaz has never looked better at age 43, and in an interview with British Voguein 2010, she shared her salacious secret to staying young.

"The fountain of youth [for me], let's see... I guess it's exercise, healthy diet, lots of water, lots of laughter, lots of sex," she told the magazine. "Yes, sex, we need that as human beings. It's healthy, it's natural, it's what we are here to do!"

Doing the decent brother-in-law thing! The Voice's Joel Madden greets sibling Benji's actress wife Cameron Diaz at Sydney airport

Voice star Joel Madden was waiting at Sydney airport to collect his brother's wife Cameron Diaz as she jetted into Australia at the weekend.

The 42-year-old American actress looked in great shape after the long haul flight and flashed onlookers a smile as she touched down on Saturday morning.

The Mask star looked flawless as ever cloaking her model physique in a pair of slouchy, ripped jeans and a chic cashmere jumper. 

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Diaz Down Under: Joel  Madden picked up brother Benji's new wife Cameron Diaz to Australia for the first time since couple tied the knot in January

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Casual chic: The Mask star rocked a laidback style for the journey cloaking her model legs in a pair of slouchy, ripped jeans, grey moccasin boots and a black cashmere jumper as she landed on Saturday

She teamed her relaxed apparel with a pair of grey moccasin boots, tying a cream sweater around her diminutive waist and slung a leather bag over her person.

Brother in law Joel, 36, formed Cameron's welcome party of one as he turned up to pick her up.

Cameron's trademark golden blonde locks fell around her shoulders and she slipped on a pair of ubiquitous designer sunnies to ward off any attention.

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Reunited! The Hollywood star was beaming as she landed in Sydney

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Jetting in! The 42-year-old actress looked fresh as she landed showing on signs of fatigue from the long haul flight from the US

The natural beauty kept her makeup look simple, wearing a light base of foundation and a dusting of pink blush on the apples of her cheeks.

Flashing her engagement ring, the Californian star looked relaxed and happy to be reunited with her husband of eight months.

American musician Joel was true to form in an oversized hoodie, black skinnies and wore a backpack slung over one shoulder.

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Californian girl: Cameron's trademark golden blonde locks fell around her shoulders and she slipped on a pair of ubiquitous designer sunnies to ward off any attention

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Keeping it casual: American miusician Joel was true to form in an oversized hoodie, black skinnies and wore a backpack slung over one shoulder

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Musical duties: The Good Charlotte star is currently in Sydney filming The Voice Australia for which he is a mentor alongside Joel, Ricky Martin, Jesse J and Delta Goodrem

Madden brothers get into an argument on The Voice

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One half of The Madden Brothers, the musician wore a black cap and a pair of sunglasses but failed to go under the radar with the high-profile actress.

The former Good Charlotte star is currently in Sydney filming The Voice Australia for which he is a mentor alongside his brother Benji, Ricky Martin, Jesse J and Delta Goodrem.

While Joel's wife Nicole Ritchie was in Sydney in March, coupling visiting her husband with her nurturing her fashion line House of Harlow 1960.

Meanwhile, Cameron's arrival has been hotly anticipated with speculation on when she would make the foray to Australia bubbling away for months.

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Spotted: The Annie actress and her brother-in-law chatted as thry met up at the aiport

The Annie actress and her husband Benji wed in January at their Beverly Hills mansion, following an eight month courtship.

'We couldn't be happier to begin our new journey together surrounded by our closest family and friends,' the couple said in a statement to People.

In attendance were Reese Witherspoon, Drew Barrymore and Gwyneth Paltrow as well as Diaz's new brother-in-law and his wife Nicole Richie.

Cameron Diaz and Benji Madden 'Are Eager to Have Children': Source

Benji Madden and Cameron Diaz

NOEL VASQUEZ/GC IMAGES

BY JACQUELINE ANDRIAKOS

 @jandriakos 

07/01/2015 AT 10:00 AM EDT

Cameron Diaz and Benji Madden are loving the newlywed phase. But how long will it be just the two of them? 

A source close to the actress tells PEOPLE that the Bad Teacher star, 42, is "so happy being a wife" to the 36-year-old musician, adding that "both of them are eager to have children." 

"[Cameron] will take things as they come, but don't be surprised to see her calm down a bit and get in the best shape for a possible pregnancy," says the source. 

Frequently seen out in her workout wear, the Body Book author is a major proponent of maintaining an active lifestyle. But her love for sports and fitness "may have to be toned down a bit" before growing her family, the source explains. 

Keep up with Cameron Diaz in the pages of PEOPLE Magazine by subscribing now.

While Diaz and Madden continue to remain a twosome, they are busy filling their days with sweet dinner dates and flooding each other's social media with cute messages and photos. The rocker even inked his wife's name on his chest in February. 

The couple married in an intimate ceremony at their Los Angeles home on Jan. 5. "Getting married is the next step when you are totally in love and comfortable with someone," a source told PEOPLE at the time. "Cameron has found true happiness."