TMZ reported that the 45-year-old popped the question in Montecito, Calif., on Sunday, October 17. In footage obtained by the outlet, the Blink-182 drummer could be seen leading the reality star onto the beach.
The Poosh founder also shared the good news on Instagram. "forever @travisbarker," she captioned photos of the pair embracing on the beach surrounded by roses and candles.
Kardashian's family and friends were ecstatic in the comment section but fans had their eye out for Disick's reaction. The self-proclaimed "Lord" does not appear to have publicly acknowledged the engagement so far.
"Has anyone checked on Scott?" one fan commented on the 42-year-old's post.
"Scott crying rn," another joked.
"scott is quaking," a third fan wrote.
Fans also wondered how Barker's ex Shanna Moakler took the news. The model does not appear to have publicly commented on her ex-husband's engagement.
"Shanna Moakler, girl, are you ok?" one fan tweeted.
"what if scott disick and shanna moakler started dating," another user joked on Twitter.
In February, Moakler told Page Six that Barker is "my friend and co-parent, and I want him to be happy. And if being with her makes him happy, and she’s happy, I’m happy for both of them, honestly."
In May, she told PEOPLE that's she is "very much over my ex. It’s been a long time." However, she admitted she thinks "some of the PDA that he’s doing with her is weird."
Disick also had something to say about the couple's public displays of affection.
In August, the Flip It Like Disick alum reportedly sent Kardashian's ex Younes Bendjima a photo of her and Barker getting steamy. "Yo is this chick ok!????? Brooo like what is this. In the middle of Italy," Disick reportedly messaged the model. "Doesn’t matter to me as long as she’s happy. PS: I ain’t your bro," Bendjima shot back.
The musician and Kardashian were first linked earlier this year before they went Instagram official on Valentine's Day.
Barker and Moakler tied the knot in 2004 but divorced in 2008. They share children Landon, 18, and Alabama, 15.
An OK! insider previously spilled that the mom-of-three "fully believes this isn't just a honeymoon phase, but that Travis is the man she's going to share her dreams with" while Barker has been "telling everyone he's hit the jackpot with Kourtney."
"He's planning an ultra-romantic proposal," the source said at the time. "He's still looking for the perfect ring, but that doesn't mean the baby-making has to wait until it's on her finger."