The model posted a snapshot of the Hunger Games alum to her Instagram Story on Jan. 13, showing Liam taking a dip in the ocean as he flashes the camera a smile.
Per People, Gabriella captioned the photo, "It's Liam day," with a smiley face.
Liam and Gabriella, 26, first sparked romance rumors in December 2019 when he was photographed introducing her to his parents, Craig Hemsworth and Leonie Hemsworth, in Australia. An insider told E! News at the time that the meeting "seemed like a happy, family environment."
A second source close to Liam told E! News in January 2021 that his relationship with Gabriella is "low key," adding that "they like the same things and have the same lifestyle."
"It's not a rollercoaster of highs and lows," the second source said. "Gabriella is very laid back and even keeled. The family very much approves and likes having her around."
Keep scrolling to see more of Liam's best photos in honor of his 33rd birthday.