Former Riverdale actress Lili Reinhart has been dating actor Jack Martin since spring 2023, and they regularly attend events together. Behind the scenes, Martin is Reinhardt’s rock. In January 2025, Reinhart credited him with helping her when she sought a diagnosis for a chronic illness she was suffering from. “Jack’s love and support never wavered, even during times when my body was really falling apart,” she wrote on her Instagram Story. (She revealed to Self that doctors believe she has interstitial cystitis.)
Here’s everything you need to know about Martin, his relationship with Reinhart, and her surprising relationship with ex Cole Sprouse.
Learn more about Lili Reinhart
Who is Jack Martin?
Martin grew up in McLean, Virginia and graduated from Georgetown University in 2019. However, she was always interested in acting and took film acting classes at NYU Tisch’s Stonestreet Studios Film & Television Conservatory.
He writes on his website that after “nearly missing out on a big role in a major feature film,” he realized how much he loved acting, with “my first connection to acting coming from a wild experience in fifth grade.” In an interview with Bello, he talked about how his interests developed.
“I went to university to study political science thinking I wanted to pursue a career in politics, but I changed my mind after my first semester,” he said. “I remember talking to my mom and one of my friends, and we were sitting there talking about what I wanted to do with my life. I didn’t really know what I wanted to do with my life at the time…This is like halfway through college. And they were like, well, you seem like you really like acting, I think you should try to be an actor. Don’t you want to do it?”
Martin continued, “And without any hesitation, I didn’t even think about it. I thought, of course. When I decided I wanted to be an actor, I was too embarrassed to even tell my friends about it, because I didn’t know what they’d say. I mean, all my friends in college had really classic corporate jobs…When I got that call, I was like, oh my god, that’s really happening.”
What is Jack Martin involved in?
The actor amassed a huge following on TikTok before breaking into the mainstream entertainment industry. Although he currently has nearly 1 million followers, he seemed hesitant to start a social media platform.
“I was an elitist about TikTok. I was like, ‘I’ll never download that app.’ It’s for 16-year-olds to dance with their shirts off,” he told Comic Book. “Then I went out there and realized I could make anything. I could make any video for under a minute.”
He added: “I saw a guy doing a skit about being rich or something, and it was terrible. I thought, ‘Oh, I could totally do that.'” I started doing skits. I started doing more of that. ”
Martin got both a manager and an agent from TikToks and was soon auditioning during pilot season. He has been cast as Josh Harris in the NBC sci-fi series La Brea. The show ended in February 2024.
When did Martin and Reinhardt start dating?
In April 2023, Page Six shared a photo of Reinhart kissing Martin outside Los Angeles Airport. They became official on Instagram in July when Martin posted a carousel of photos with his girlfriend.
In August 2023, she shared an Instagram Story celebrating Martin’s birthday, calling him “Cowboy” in a photo of him leaning against a car window wearing a cowboy hat.
In September of the same year, they attended the Venice Film Festival red carpet official and were also photographed attending a Giorgio Armani event.
Since then, the two have regularly appeared at events together, including Giorgio Armani’s spring 2025 show in October 2024.
How did Martin support Reinhardt through his personal health struggles?
Reinhart posted an Instagram Story in January 2025 detailing how long her partner stood by her while she sought diagnosis and treatment for her chronic illness. Reinhardt’s doctors believe she has interstitial cystitis.
“I would not have been able to get through this without my partner in my life,” Reinhardt wrote. “It’s not easy having a girlfriend with a chronic illness, when I was barely able to leave the house for months, unable to walk due to pain, and extremely depressed by the change in quality of life. Jack’s love and support never wavered for a second while my body was really falling apart.”
What happened between Martin and Cole Sprouse?
Weeks before Martin and Reinhart announced their relationship, Martin was criticized by fans for mocking Sprouse’s interview with him on his Call Her Daddy podcast. In the actual interview, Sprouse claimed that he and Reinhart “did a lot of damage to each other” but were “good friends now.”
In the sketch, Martin refers to himself as “The Three Sprouse Brothers” and dresses like the Riverdale actor while pretending to smoke a cigarette.
Reinhart posted a photo with Martin in April 2025.
In a rare photo shared on April 27, Reinhart posted a shot of Martin kissing her on the cheek. In the first photo, she stands in front of a bush of bright red roses, smiling at the camera, and in the second, she closes her eyes. The rest of the merry-go-round is like a day in a gorgeous garden. She captioned the photo, “Having fun🌹”
Reinhardt made rare comments about her relationship in November 2025.
In an interview with Marie Claire, Reinhart said her relationship with Martin was “in the sweetheart era.”
“It’s very difficult for me to be away from the people I love,” she said. “I’m a very homely woman and love sitting on the couch at home with my boyfriend and dog. Nothing brings me more joy than that. Without that, my mental health suffers.”
Reinhardt continued, “When I’m working, he visits me. When he’s working, I visit him. And when we’re both working at the same time, which has been the case a lot this year, you just have to keep your head down and get through it. It’s exhausting when you don’t see someone for more than eight weeks.”
