Presenting: Mason Thames and Mckenna Grace’s Full Relationship Timeline, From ‘Regretting You’ to ‘Nimrods’

Fact of life: Everyone loves a good showmance, which is why the Regretting You press tour had the internet positively spiraling. For months, the film’s stars Mckenna Grace and Mason Thames teased fans about whether or not they were dating in real life with their flirty off-screen behavior…until, at long last, they officially hard-launched their relationship.And by hard-launched, I mean Mckenna brought Mason as her date to the biggest night in Hollywood, the 2026 Oscars.Roger Kisby/The Academy//Getty ImagesNow they’re back on our screens with Nimrods, which means the time has come to review Mckenna and Mason’s relationship timeline from the very beginning. Starting with...Jump to:August 2024March 2025April 2025May 2025June 2025August 2025September 2025October 2025February 2026March 2026June 2026July 2026August 2026August 2024The cast for Regretting You—the film adaptation of Colleen Hoover’s novel of the same name—is announced, with Mckenna and Mason set to star as the film’s romantic leads.Soon after, the two make their first public appearance together at Netflix’s Incoming House Party event.Matt Winkelmeyer//Getty ImagesMarch 2025Filming begins in Atlanta...and presumably, sparks start flying.April 2025Mckenna oh-so-casually drops this TikTok of a playfully staged kiss between herself and Mason, which has fans like ??????Not long after, they’re spotted together at the Miami Heat vs. Atlanta Hawks NBA game with their Regretting You costar Dave Franco.Paras Griffin//Getty ImagesMay 2025In May, Mckenna posts a photo dump on IG, which includes a few cute candid pics of herself and Mason. Swiiiipe:June 2025Mckenna and Mason first spark dating rumors after they’re photographed holding hands while spending time together in New York City. I mean...TheStewartofNY//Getty ImagesTheStewartofNY//Getty ImagesLater, Mason chats with Seventeen and has nothing but good things to say about Mckenna calling her “one of the most driven people I’ve ever met in my life” and “one of the funniest people I’ve ever met.”When asked how it feels to have so many people speculating about their relationship (particularly after *that* TikTok) he says, “Yeah, it is strange. But I’ve always sort of been off the internet. I’ve always kind of kept everything to myself and been very personal. Having people speculate so much, especially having mutual friends texting me and asking…it’s wild. I’m still not used to it.”August 2025Mason celebrates his birthday...with Grace! As he explains to People, “I was home back in Texas and I got like a little birthday week and Mckenna was also there, and that was really nice. We spent that together and I spent some time with my family and some of my best friends, and it was nice. It was chill.”Of Mckenna, he adds, “She’s so funny and such a nice person, so she gels with everybody.” Asked about their experiencing filming together, he continues to gush, “I've never met somebody with a work ethic like hers. She pushes herself every day harder and harder and she’s so incredibly talented. So just watching that, it really motivates me.”Plus, Mckenna keeps relationship rumors alive with this cute TikTok:September 2025The two stars attend a screening for Regretting You and have lots of sweet moments, like this one. Ahem:Anna Webber//Getty ImagesOctober 2025Mckenna is asked about that April TikTok during an appearance on Today with Jenna & Friends, with Jenna Bush Hager straight-up saying, “So he’s your partner in the film, but is he also kind of your partner?”And while she initially dodges the question with a “no comment,” Mckenna eventually says, “I love Mason. He’s my favorite person.”Plus, the Regretting You press tour begins, leading to plenty of moments like these:Gerald Matzka//Getty ImagesGerald Matzka//Getty ImagesBen Kriemann//Getty ImagesTristar Media//Getty ImagesFebruary 2026After nearly a year of dating rumors, Mason takes to Instagram to share pics of himself and Mckenna vacationing in Paris—including one photo where Mckenna is kissing him on the cheek in front of the Eiffel Tower.Add Cosmopolitan as a preferred source in your Google search results.Use your Google account to add this to your settings.InstagramMckenna then slides into the comments section to write, “this is my favorite post.. for unbiased reasons.” Oh la la!March 2026In case you have any doubts left about Mckenna and Mason’s relationship status, she fully brings him as her date to the 2026 Oscars, where they share lots of cute moments like this one:Roger Kisby/The Academy//Getty ImagesAlso! Here’s some fun BTS moments from Mckenna:June 2026McKenna celebrates her 20th birthday with her man...and a few other friends.July 2026Then it’s Mason’s birthday, and he and Mckenna celebrate with the sweetest duo of Olivia Rodrigo’s “honeybee.”August 2026Nimrods hits theaters, giving us even more of these two together on the big screen.Mason also chats with E! News and reveals how he and Mckenna first found out they were doing back-to-back movies together.“I was filming How to Train Your Dragon 1 and I had signed on to Green Day maybe a couple of weeks before,” he recalled. “I didn’t think she was signed on. It wasn’t even a thought in my mind. Then I signed on to Regretting You with Mckenna. I’d met her once before, so I texted her and I was like, ‘Hey, super excited to work with you. It’s gonna be fun.’”He continued, “She was like, ‘Yeah, I’m so excited for Green Day.’ I was like, ‘What? What are you talking about? Green Day?’ So we found out we were doing two movies back-to-back. It was a wild, crazy, weird coincidence.”Oh, and he also says this of his connection with Mckenna: “We say all the time, if we hadn’t met before, and we met on the day and were shooting a movie, our chemistry would be the same. That just goes with how easy it is to work with her.”More on these two and their budding relationship as we have it.