The 18-year-old was pictured making her way through Los Angeles International Airport on Monday evening (7 December), clad in the skull-emblazoned shirt from Kanye's tour.
She was returning to LA from Miami, where she'd been attending the Art Basel Festival with model friend Hailey Baldwin.
Kylie wore Kanye's tour shirt on the same day Kanye and wife Kim Kardashian West announced they'd named their baby son Saint.
Keeping Up With The Kardashians star Kim, 35, posted the baby name to her official app, ending months of speculation about what the couple might choose as a moniker for their second child.
Easton had been rumoured, as had Robert, in tribute to Kim's late father, but the couple surprised everyone by opting for the rather unusual Saint. Saint West. Kim and Kanye, 38, are also parents to daughter North, two.
Meanwhile, in the latest episode of Keeping Up With The Kardashians aired in the US, viewers saw Kylie struggling to cope with the drama between parents Kris and Caitlyn Jenner. Filmed back in August, we saw Kylie debating whether or not to invite them both to her 18th birthday as she didn't want any tension or awkwardness.
All you need to know about Kim Kardashian: