AceShowbiz - Caitlyn Jenner took her rumoured girlfriend, Sophia Hutchins, to daughter Kylie Jenner's birthday bash.
The youngest of the Kardashian/Jenner clan celebrated turning 21 on Thursday, August 09 with a huge star-studded bash at Delilah nightclub in Hollywood.
And the 68-year-old former sports star shared a series of photos with Sophia, 22, and her daughter in a photobooth from the party on Instagram.
"Had so much fun in the photo booth at @kyliejenner's birthday party!" Caitlyn wrote alongside the snap on Friday, August 10.
The I Am Cait star and the transgender model have been the subject of intense speculation over the past year, with reports even claiming that the couple are living together and is engaged.
Caitlyn briefly addressed their relationship during a recent interview with Variety.
"We are not going to get into that. But we are very close. We do a lot of things together. We're kind of inseparable," she explained. "We're the best of friends."
The duo also attended the 2018 ESPY Awards together in July.
Sophia is a student at Pepperdine University, and credited Caitlyn for inspiring her to transition.
She told her university newspaper that seeing the 20/20 special about Caitlyn's journey from male to female "made it so much more real".
"I've always had the question of, 'Do I want to transition from male to female?' I never thought a lot about doing it until I got into college because I was able to break away from my family and started to establish my own identity," Sophia explained.
The couple has shared several snaps of each other on social media, including one shared by Sophia showing her and Caitlyn attending an event together earlier this week, ends August 12.