But how did it all begin?
Rochelle, then Wiseman, was one fifth of pop group The Saturdays when she first caught JLS star Marvin’s eye.
They seemed to have met in 2010 and their paths began to repeatedly cross at awards shows and music industry events.
And it didn’t take long for things to progress.
They got serious very quickly, and by 2011 they were engaged.
They got married the following year, tying the knot at Blenheim Palace in Oxfordshire on July 27, 2012.
Rochelle, 31, made a stunning bride, opting for a strapless flowing fishtail dress designed by Vera Wang, and wearing her long brunette locks in loose waves.
Marvin, 35, looked dashing in his white tuxedo jacket, with a black waistcoat and bow tie.
Rochelle and Marvin’s love story actually goes way back to when she was just 16 and he was 20.
She confessed that they first met when she was just a teen, and her Saturdays manager even tried to warn her off dating him.
But she ignored the advice when they embarked on their romance years later.
She said on The Jonathan Ross Show: “We met actually when I was younger, when I was probably about 16. Nothing like that.
“Fast forward a few years on, he was in JLS, I was in the Saturdays. We were at a club, and they had put all the bands together.”
It seems Marvin took a fancy to Rochelle, and didn’t want to risk leaving the club without her phone number.
Rochelle continued: “I went to the toilet and my bag was on the chair. He took my phone out of my bag, called himself from my phone and got my number.
“It’s weird. He’s got the last laugh because I married him, but it’s weird. In a creepy, restraining order way.”
Rochelle, who presents Ninja Warrior on ITV, says she had to date Marvin in secret at first, because her manager was worried the relationship could ruin her career.
She said: “We were doing really well at the time. I remember having this meeting with our A and R manager, and I remember him saying to us, ‘It’s going really well, it’s quite hard for girl bands because girls have to like you and not feel intimidated…
“‘The only thing you can do to mess this up is date someone from a boy band. If any of you date JLS then you’re screwed’. We were sort of dating in secret.”
Thankfully, it all worked out in the end, and in May 2013, they welcomed their first daughter, Alaia-Mai.
Their second daughter, Valentina Raine, came along in March 2017.
Today, they announced that their third baby is on the way.
Rochelle shared the news on Instagram with an Easter themed post, including a baby scan arranged next to a tiny knitted cardigan and booties and a sign that read “We’re expecting baby Humes October 2020”.
“There’s a baby bunny in my oven…,” Rochelle captioned her post.
While the couple have always been open and honest about their relationship, they only recently started sharing proper pictures of their girls.
Before, any pictures they shared didn’t show their daughters’ faces, and after they started posting snaps, fans were blown away by home much they look like their stunning mum.
Explaining her change of heart, Rochelle wrote: “Our girls
“I think it would be weird for me to post this without saying anything…but we’ve made the choice to share a bit more of our family.
“Alaia is aware of social media now (gulp) and she often asks why her cousins and other family are featured but not her and to be honest, we don’t really have the answer.
“Obviously it was coming from a place of protection maybe to a fault, let’s face it none of us really have this figured out.
“So here they are our babies, they wont be on here often but thought you might like to meet them.. Please be kind”