Beau Ryan has been hospitalised with a mystery illness.

It’s been a difficult few days for Kara and Beau Ryan.

The 30-year-old mum of one posted a photo to her personal Instagram page on Tuesday night, sharing the news that Beau, 31, has been admitted to hospital.

Wearing a face mask, the hairdresser and makeup artist captured a selfie with her husband, who appears to be sleeping in a hospital bed.

A photo posted by By Kara Ryan (@whoseempire) on Aug 29, 2016 at 11:54pm PDT

Kara told her 15,000 followers: “It’s been a loooong 2 Days!!!”

While the nature of Beau’s illness is unclear, Daily Mail Australia reports his condition is ‘not major’, and that doctors are conducting further tests.

Kara’s followers have taken to the post to express their get well wishes for the retired NRL star, who played for the Cronulla-Sutherland Sharks and later the Wests Tigers between 2007 and 2014.

A photo posted by Beau Ryan (@beauryanandkara) on May 11, 2016 at 12:31am PDT

Last year the couple – who were high school sweethearts – were rocked by rumours of an extra-marital affair between Beau and Hi-5! alum Lauren Brant, which surfaced when Brant’s ex-fiancé did an interview with Woman’s Day.

Despite the intense media pressure the cheating controversy placed on Kara, she told the publication: “I was actually more worried for Beau if I’m honest.”

Kara said her, her husband and daughter Remi sticking together was always imperative.

“He was still a very beautiful person and a loving father. The grass isn’t always greener, and while it was a difficult situation, running from anything in life is never the answer,” she said.