Speaking to the latest issue of OK! Magazine, Laurie spoken candidly about their change of plans, after he was rushed to hospital.
She commented: “In the lead up to the wedding Dennis was very ill, I knew something wasn’t right so I called an ambulance.”
The ex Albert Square favourite continued: “When we got to the hospital we found out he had pneumonia and sepsis. The consult said to him: ‘Your wife-to-be has saved your life.
“‘If you had waited another night to come in things would have been very different.’”
Meanwhile, during the chat, Laurie also discussed how they fell for each other after 14-years of friendship, as well as their big day. “I ran into Dennis at a restaurant in late 2017 and my stomach flipped when I saw him and I started getting butterflies,” she said.
“It was like something had changed inside me and I realised I liked him as more than just a friend.’”
She added: “We wanted it to be a very intimate, relaxed day so we only invited 60 of our closest friends and family.”
Their wedding was attended by the likes Tamzin Outhwaite, who played Mel Owen in the long-running programme.
Four years ago, The Sun reported Laurie had split from her partner of five years, John Milroy.
At the time, a source told the publication: “Laurie was heartbroken when she and John split up, but both of them knew the relationship had run its course.
“It became clear it just wasn’t working — they weren’t happy together.
Laurie and John have a seven-year-old daughter together.
She first appeared in EastEnders in 2004 and later left for maternity leave in 2011.
She went on to become Ian Beale’s (played by Adam Woodyatt) fourth wife.
After several years on and off on the show, she finally departed two years ago.
Read the full story in this week’s OK! Magazine – out today.
EastEnders continues tonight at 8pm on BBC One.