The 24-year-old London actress and her ex-TOWIE husband met in 2014, with the reality star proposing while the couple were on holidays in Greece in 2015.
The wedding took place in the €8 million Delamere Manor in Cuddington, Cheshire, according to the Daily Mail, an estate formerly owned by Take That star Gary Barlow.
Jacqueline, who plays Lauren Branning on the long-running BBC soap, was clearly still beaming from the weekend's celebrations when she took to her social media accounts to update fans on her news.
"'Best day ever x" the actress said, changing her account biographies to include the title of "Mrs O."
The couple have one daughter together, while Dan has one son from a previous relationship.
"I am the luckiest man in the world to be marrying the woman of my dreams @jacquelineMjos," said Dan when he announced their engagement, and he recently ramped up interest in the wedding when he said he couldn't wait to make the actress his wife.
"Two years ago today I proposed to my best friend. Can't wait to make this woman Mrs Osborne. Love you darling," he captioned a "throwback" photo of the couple's engagement.
The site of the celebrations, Delamere Manor, is a 100 acre estate featuring a six acre lake and reportedly contains its own nightclub.
It was once owned by singer and songwriter Gary Barlow who reportedly had a recording studio on-site where he penned his hits.
"Jacqueline and Dan have been looking for a wedding venue for a while but nothing had really caught their eye," a source told The Daily Mail.
"Then when they saw Delamere Manor they fell in love with it. Like any couple, they want their big day to be perfect, even if it does mean their entire families travelling from their homes in London to Cheshire. They are convinced that going the extra distance will be worth it."