• Kylie Jenner shared footage of Kendall Jenner struggling on the stairs due to her outfit at Kourtney Kardashian's wedding
  • Kylie can be heard laughing at her older sister, joking that the "stairs are crazy"
  • Kendall's boyfriend Devin Booker was not in the video but was present at the wedding

Kylie Jenner seemingly poked fun at her sister Kendall Jenner in a video she shared on social media.

The Kardashian-Jenner family was in Italy this weekend for Kourtney Kardashian and Travis Barker's wedding.

As Kylie and Kendall were making their way to Castello Brown, where the nuptials were held, the cosmetics mogul playfully mocked her older sister as the latter waddled up the stairs in a skintight Dolce & Gabbana dress and cozy slippers.

Kylie was behind the 26-year-old model as she filmed her. The footage includes Kris Jenner's youngest daughter hysterically laughing while saying, "Oh s–t, these stairs are crazy," Page Six reported.

Kendall's boyfriend Devin Booker was present at the wedding, but the NBA player was nowhere to be seen in the clip.

The Poosh founder, 43, and the Blink-182 drummer, 46, tied the knot in Portofino Sunday after welcoming family and friends to the resort town days earlier.

The family kicked off the festivities with a pre-wedding lunch and rehearsal dinner. Khloe Kardashian shared snaps from the lunch, including the blue-and-white table scape with white and yellow flowers and fresh lemons.

Several celebrities were invited to Kourtney and Barker's big day, including Machine Gun Kelly, Megan Fox and Mark Hoppus, among others.

Kourtney walked down the aisle wearing a Dolce & Gabbana mini wedding dress and a veil that featured an image of the Virgin Mary and the words "family," "loyalty" and "respect" -- a nod to Barker's tattoo on top of his head. Ahead of her nuptials, she also wore a black sleeveless mini dress with a Virgin Mary emblem.

Kourtney's style choices raised some eyebrows, with a number of social media users accusing the bride of disrespecting the Catholic religion.

"I shouldn't care, but I just really feel like Travis and Kourtney's wedding is mocking the Catholic religion? They don't symbolize religious people at all. [It] just feels like mockery. I'm not Catholic, but [it] just doesn't sit right with me," one person tweeted.

"Am I the only one that thinks this is totally inappropriate and disrespectful? Really @kourtneykardash? The Virgin Mary?" another wrote alongside a photo of Kardashian posing in the black dress.

During the reception, Kourtney was seen wearing a "Mrs. Barker" jacket while dancing to Beyoncé's "Crazy in Love." DJ Cassidy emceed the party from midnight to 3 a.m., an unnamed source told Page Six.

The DJ closed the set with Etta James' "At Last," to which Kourtney gushed, "This is our dance."

Kendall and Kylie Jenner
Kendall and Kylie Jenner may be collaborating on a new project. In Picture: Kendall and Kylie Jenner arrives for NBCUniversal's Golden Globes After Party, January 8, 2017 at The Beverly Hilton Hotel in Beverly Hills, California. Getty Images/JOHN FREDRICKS