The Love Hypothesis star has a real-life romance too. Meet her boyfriend, Jack Martin, and see how their three-year relationship unfolded.
Jack Martin is an actor, comedian and TikTok creator. He and Reinhart have been together since at least April 2023, and she calls him her partner.
Reinhart spotted a video Martin made poking fun at Riverdale, the CW show that made her famous. She liked it enough to slide into his DMs.
The pair were photographed kissing at an airport in Los Angeles in April 2023, the first public sign that they were a couple.
For his birthday that August, she posted their first public photo together: “I’m so grateful for the light you’ve brought into my life.”
In September 2023 they stepped out together at an Armani event during the Venice Film Festival. Days later, he posted a tribute for her Sept. 13 birthday.
In January 2025 she thanked him for sticking with her through a chronic illness: “Never in my life could I have gotten through this without my partner.”
She told Marie Claire in late 2025 that when one of them is working, the other visits, and that missing someone for eight weeks is exhausting.
He joined her at SXSW for Forbidden Fruits in March 2026. In June, Entertainment Tonight shared his words: “She is the kindest person I’ve ever met.”
She stars with Tom Bateman in The Love Hypothesis, on Prime Video Sept. 23. She told ELLE she showed Martin a steamy chapter of the book on a plane.
More than three years in, they keep it mostly private, and no engagement has been announced. Reinhart turned 30 on Sept. 13.