Jasmine Yarbrough's pre-wedding warning to fiancé Karl Stefanovic

Karl Stefanovic is reportedly set to to marry his fiancée Jasmine Yarbrough in less than three weeks, but apparently the fashion designer has given a stern warning to the presenter ahead of the nuptials.

The 34-year-old has allegedly told Karl it is essential for him to “shape up” for their Mexico wedding, according to Woman’s Day.

A source claimed that Jasmine told the Today host she “wants every detail on her wedding day to be picture perfect – and that includes Karl”.

Jasmine has apparently given a stern warning to Karl ahead of their wedding about his appearance. Source: Getty
Jasmine has apparently given a stern warning to Karl ahead of their wedding about his appearance. Source: Getty

Shoe designer Jasmine is reportedly concerned about how Karl will look in their wedding snaps.

“She doesn’t want them to look back at their wedding photos in 20 years with regret,” the source added.

Karl Stefanovic shredding for the wedding

Well, it appears Karl is taking his wife-to-be’s alleged warning seriously, as last week he posted a photo of himself lifting weights.

However, shredding for the wedding isn’t the only reason for his sudden change of heart when it comes to his fitness.

“I was told a little while ago by a doctor I needed to make some changes to my physical health,” the 44-year-old captioned an Instagram photo of himself pumping iron. “It’s been tough.

“I was fatter than I thought. Ha.”

Karl and Jasmine’s relationship

The couple first started dating at the end of 2016, three months after announcing his separation from ex-wife Cassandra Thorburn.

At the time Karl admitted he wasn’t planning on jumping into a new relationship so soon after their split.

“I certainly did not expect to meet someone five months after I broke up with my wife,” he told Stellar. “That was not planned.

“I did not know her before. I met her on a boat in Sydney.”

Earlier this year, Karl confirmed his engagement to Jasmine.

It was reported the Today host had popped the question with a $120,000 ring, but Karl shut down those rumours.

“The ring was made by Nic Cerrone and didn’t cost $120,000. Those figures are ridiculous,” he told TheFIX in February.

Karl’s ex-wife

Karl and Cassandra announced their separation in September 2016 after 21 years of marriage, officially divorcing a year later in 2017.

They share three children Jackson, 18, Ava, 12, and River, 10.

Cassandra Thorburn and Karl Stefanovic at the 2011 Logie Awards. Source: Getty
Cassandra Thorburn and Karl Stefanovic at the 2011 Logie Awards. Source: Getty

Back in 2011 Karl famously thanked Cassandra, who put her career on hold to look after the family, during his Gold Logie acceptance speech.

Got a story tip? Send it to tips@oath.com

Want more lifestyle and celebrity news? Follow Yahoo Lifestyle on Facebook, Twitter and Instagram.

Or sign up to our daily newsletter here.