On Monday, the Accepted actor, 44, shared a romantic birthday tribute to his girlfriend alongside a carousel of sweet Instagram photos showing the couple laughing, eating, drinking, kissing and watching a sunset from a dock.
“She is 40! ???” Long began his post. “She is also the best part of my day, everyday – even when we’re not together. She laughs with abandon. She makes me laugh the same – all the time. She sees beauty everywhere and in everyone. She thanks everyone – even when she’s suffering, she’s kind.”
The star went on to offer more loving details about his partner and their relationship.

Friend and actor Aaron Paul was among those who commented on Long’s love letter.
Bosworth and Long, 44, sparked relationship rumors in March after they were spotted together in Los Angeles. Since then, they’ve been photographed strolling the streets of New York City and kissing on the beach in Hawaii. Long also opened up about their relationship during a podcast appearance, saying he’s “never had anything like this before.”
Before going Instagram official, Bosworth posted a playful and adoring tribute to Long with a carousel of photos, including one shot of the Barbarian actor holding her in his arms.
Back in June, Bosworth celebrated her boyfriend’s 44th birthday with a romantic social-media tribute of her own, complete with a photo gallery of some of the couple’s memorable moments together.
She concluded her caption, “Happy Birthday @justinlong you make me smile so big my face hurts xx Thank you for creating peace in my heart since the day we met.”
In the first photo, both Bosworth and Long wore matching red and shared a kiss. The collection of images featured behind-the-scenes shots of the couple sharing intimate moments and silly selfies.