Adam Demos Wishes His 'Angel' Sarah Shahi a Happy 44th Birthday: 'Keep Doing You'

"Beyond grateful I get to do this life with you," Adam Demos shared of his girlfriend and former 'Sex/Life' costar Sarah Shahi

Happy Birthday, Sarah Shahi!

Adam Demos celebrated his girlfriend and former Sex/Life costar’s 44th birthday on Wednesday with a sweet Instagram tribute.

“Happy bday to my little angel!!” he wrote alongside a series of photos of the couple and solo shots of Shahi. “Beyond grateful I get to do this life with you ❤️❤️”

Related: Sarah Shahi Says She Doesn't Have to 'Pretend' with Boyfriend Adam Demos During 'Sex/Life' Scenes

He also made reference to the last photo in the carousel post which was a close up of Shahi wearing unique footwear while walking on a treadmill, sharing, “Keep doing you baby even if that means treadmill with socks and slides.”

Back in May, Shahi posted a tribute to Demos on his 38th birthday.

"Best looking 83 yr old I've ever laid my eyes upon," she jokingly captioned a photo on her Instagram Story of Demos holding '8' and '3' balloons. "Another trip around the sun."

Related: Sarah Shahi and Her 'Sex/Life' Costar and Boyfriend Adam Demos Reunite in Australia

Demos also shared a throwback photo of the pair in Kingston, Ontario, in March, writing, “One year ago today Miss ya 🇨🇦And all the legends I now call mates.”

She responded in the comment section, sharing, “Long live cottage livin.”

Related: Inside Sarah Shahi and Adam Demos' Real-Life Relationship After Meeting on 'Sex/Life'

While promoting the second season of Sex/Life on PEOPLE in 10 that month, Demos revealed three reasons why he loved Shahi.

"Her heart. That's first and foremost," he told host Makho Ndlovu, adding, "Her kindness."

For his final selection, he couldn't narrow it down to just one aspect of Shahi, sharing, "It's everything. Can the third thing be everything? I'm her biggest fan for sure, so that would be the third one — everything. I think she's exceptional in all aspects of life."

After Ndlovu described Shahi as "stunningly gorgeous," Demos couldn't help but agree. "She's a goddess. It's ridiculous," he said. "But, she could look the way she did but if she didn't have what's going on in the soul ... but luckily, it all works together. Yeah, I'm a lucky man for sure."

When asked about the last romantic thing they did, Demos shared that the pair enjoy casual dates together.

"We went on a cute little hike with the dogs yesterday," he said. "Is that romantic? Anytime you can steal a moment and just connect, it doesn't really matter the setting. It's just about, you know, keeping your check and seeing how each other's going."

Shahi opened up about the pair's working relationship while they played on-screen couple Billie and Brad on Sex/Life, which was canceled after two seasons.

"He still is one of my favorite scene partners because everything becomes very easy with him — whether or not it's a scene about loving one another or hating one another — all I have to do is kind of look at him and my work is done. I'm pretty lucky in that aspect," she told PEOPLE in March.

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