Los Angeles, California – Dax Shepard is back at it with his TMI Instagram posts, having dropped a naked photo of his wife Kristen Bell to in a hilarious celebration of Mother's Day.

Idiocracy and When in Rome star Dax Shepard has shared a naked photo of his partner Kristen Bell in an Instagram post dropped on Sunday, claiming that his wife has really got it going on.

"Look at this specimen," he said, having censored her butt with a red square on the image, which he posted to his Instagram account. "My girls and I hit the MegaMom Lottery in spectacular fashion."

In the post, Kristen appeared to be wearing only knee socks as she balanced on her hands in a downward dog yoga pose, stripped-down and outside.

The star expressed a great deal of love and affection in the humorous post, where he reiterated how "talented" and "Generous" Kristen Bell is, exclaiming that "Mom’ing has changed since I was a kid... And I’m here for it."

Kristen continued to celebrate the day in her own unique way, by sharing a bouquet of flowers she was gifted by a popular cannabis brand with her 15 million-plus Instagram followers. It seemed to be filled with pre-rolled joints.

The couple have been married since 2013. In an annual anniversary post from Kristen - the couple have been married since 2013 - she said that they "have been living the celebration of [our] commitment every moment since."

The pair have two daughters, Lincoln and Delta, and Dax's next role will be voicing a character in the upcoming Paw Patrol movie, alongside Kim Kardashian.

Amidst the fun, Dax and Kristen have been candid about their relationship ups-and-downs, and going to therapy. He has publically struggled with his addiction to prescription painkillers after multiple injuries and motorcycle accidents, something that he said he's been honest about with family.

Kristen often posts sweet tributes to her jokester hubby on Instagram, and said Dax's "commitment to growth is astounding" and his "honesty is admirable."