The make-up mogul shares daughter Stormi, two, with the "Astroworld" rapper, and took to social media to show off the pair's celebrations on Sunday, June 21, 2020 while the family isolates together during lockdown.
"The best daddy to our daughter," Jenner captioned a shot of the pair wearing matching box braids and sharing a sweet embrace on her Instagram Story.
Kylie also shared snaps from the festivities, including one of Travis posing with Stormi in front of a floral arrangement which read "DADDY."
There was also an intricate balloon decoration as well as several framed photos of the dad and daughter together on display in honour of the annual holiday, along with sweet treats including cookies, which Stormi helped her mum decorate.
Despite splitting eight months ago, Kylie and Travis have been self-isolating together inside her Los Angeles mansion for the past three months amid the Covid-19 crisis, prompting fans to speculate they're back together.
Neither star has confirmed the rumours.