The actors wed in 2010 and share three children: daughter India Rose, 10, and twin sons Tristan and Sasha, 8

The 38-year-old actor posted a picture to Instagram Monday in honor of wife Elsa Pataky's 46th birthday.

Sharing a black and white snap from behind the scenes of the Thor: Love

and Thunder set, Hemsworth began, "Happy birthday to this gorgeous lady!

Thanks for always being my rock to sit on but way comfier," he joked,

pointing to how he sat on Pataky's lap in the image. "Love you

Two of the Hemsworth kids make cameos in the latest Thor movie, joining

“

costars Christian Bale, Natalie Portman, and director Taika Waititi's children. Chris's daughter "plays the character of Love" while ones of his sons portrays a young Thor.

It's really cool. They really wanted to be in it," said Hemsworth last month.

during what appears to be a moment of downtime during filming.