Kim Kardashian Says She Was 'Sleeping' During Sister Kourtney and Travis Barker's Vegas Wedding

"I found out in the group chat," Kim Kardashian told Jimmy Kimmel on Wednesday of her older sister's surprise ceremony

Kim Kardashian was a little late to the party.

The reality superstar, 41, along with her sisters Kourtney Kardashian, Khloé Kardashian and Kendall Jenner — as well as mom Kris Jenner — all visited Jimmy Kimmel Live! in Hollywood on Wednesday evening in preparation for the premiere of their new Hulu reality series The Kardashians.

When Kimmel, 54, asked if the group was aware of eldest sister Kourtney's surprise wedding earlier this week to beau Travis Barker, momager Kris, 66, said, "I knew, and Khloé knew."

"I was on FaceTime," Khloé said, while Kim admitted, "I was sleeping."

During their visit, Kim and family explained that they have a group chat to keep up with one another, and the SKIMS mogul said she found out via text.

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"She put it in the group chat," Kim continued. "Like, 'Oh, hey guys, by the way...I got married last night!' And I woke up to like, a million texts."

Lionel Hahn/Getty; Jeff Kravitz/FilmMagic

The late-night appearance comes two days after Kourtney, 42, and Barker, 46, had a spontaneous ceremony at a Las Vegas wedding chapel following Sunday's Grammy Awards. Kourtney later opened up about their outing at One Love Wedding Chapel on Instagram, confirming that she and Barker did not get legally married because they did not have a license.

"There was no possibility to get a marriage license at that hour," she told Kimmel. "We asked like five times, 'What do we have to do to make this happen?' It was 2 a.m., and they were like, 'It opens at 8 o'clock.' "

Axelle/Bauer-Griffin/FilmMagic

Last month, Kourtney revealed in a trailer for Hulu's upcoming The Kardashians series that the couple hoped to grow their family together. "Travis and I want to have a baby," she said before the couple was seen entering a doctor's appointment.

The new Kardashians series, which will also features youngest sister (and new mom) Kylie Jenner, debuts on April 14.

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The series is sure to cover a fair share of the busy and recent goings-on of the KarJenners. Hulu released the official trailer for The Kardashians back in February, highlighting Kourtney's engagement to Barker in October.

"This makes me so happy," Kris told the couple after the proposal.

"She's never had a reaction like that for me and it's happened a few times," Kim joked.

The Kardashians. The Kardashians/Instagram

Jokes aside, Kourtney recently revealed to Variety that her romance with Barker won't be her main storyline on the show.

"I definitely hold my relationship really close. It's so sacred to me and I am very protective of it. I think I've learned a lot of lessons," Kourtney said last month. "There is a lot of us on there, and we've had such a good time doing it because we have such a good time when we're together, but I definitely want to protect it as much as I can. But also, this is my life."

She noted that the Blink-182 drummer didn't have any reservations about being on camera "as long as we're happy with it."

"He obviously has a full-time job and a full career, so it's not his thing, but I think he's happy to, and we have had so much fun while we've been filming certain things that we're doing, so I'll just invite the producers to come along," Kourtney added.