"Crazy about my man!!!!!" Liv Tyler wrote of fiancé David Gardner in a new Instagram post
Credit: Source: Instagram

Liv Tyler has a lot to be thankful for this holiday season – starting with her “sweet sweet” fiancé, David Gardner.

The actress, 38, and the sports agent/manager were under-the-radar engaged for nearly a year before sources confirmed the big news to PEOPLE in September. But Tyler wasn’t shy about showing off her love for Gardner – and her stunning diamond engagement ring – in a new photo she posted on her Instagram account Sunday.

“Crazy about my man!!!!! sweet sweet daddy , friend , fiancé thank you !!!!!! Grateful,” Tyler captioned the snapshot of the couple cuddling up to each other. Taking center stage in the photo was her sizable diamond sparkler – just one more thing to be grateful for!

The couple, who have been together since 2014, welcomed their first child together, son Sailor Gene Gardner, in February. They also have two children, Milo, 10, and Gray, 8, from previous marriages.

Opening up about her busy life – which includes a role in HBO’s The Leftovers – in a recent interview with More magazine, Tyler said, “I feel like I’m conducting a giant orchestra, because there’s so many moving parts. It’s like, ‘Over there, you guys do that!’ And then, ‘Over there, you do this! All together now!’ ”

“It’s kind of what it feels like to be a mom, isn’t it?” she added. “In the modern world?”