The Game of Thrones star posted a photo of herself kissing her beau in front of the Eiffel Tower on Saturday, June 22.
"Easy now! 1 week to go! Ha! See you at the wedding!" the talk show host wrote in the comments section.
Fans were quick to pick up on the innocent mistake and slammed Dr. Phil for ruining the secret. "There goes Dr. Phil shooting off his big mouth and destroying their privacy," one commenter wrote. "Leave it up to Dr. Phil to do something stupid," wrote another.
However, some fans came to his defense and insisted he didn't do anything wrong. "He didn't spoil anything, the news has been everywhere for weeks lol. There are tons of posts from official websites that say that Jophie's wedding is on June 28 & 29," one person noted.
Sophie, 23, and Joe, 29, are already legally husband and wife following their quickie wedding in Las Vegas after the Billboard Music Awards on May 1, 2019.
Sophie teased that their official ceremony would be held in France sometime this summer during an interview on The Graham Norton Show on May 24.
Do you think Dr. Phil ruined Sophie & Joe's wedding date secret? Sound off in the comments below!