AceShowbiz - Katherine Schwarzenegger isn't shy to put her body on display. While she's usually known for her modest appearance, the wife of Chris Pratt has posted a rare sexy picture on her Instagram page.

The mother of two made the very rare move on Monday, July 24. Sharing a series of snaps from her summer vacation with her family and friends, she included one mirror selfie that showed her wearing nothing but black lingerie.

In the snapshot, the daughter of actor Arnold Schwarzenegger posed in a bathroom with a marble counter, black fixtures and beige walls as she held up her phone in one hand. She appeared to go makeup free while wearing a bralette and some very high-waisted undies in matching color. Her hair was up as she had a slight smile on her face.

"Mountains and friendship," she captioned the post, which also included pictures of her two daughters walking hand-in-hand during a stroll and playing in an inflatable pool. Her mother Maria Shriver was seen holding one of her daughters while on a boat in another photo, while she took another selfie during a stroll with a female friend.

Katherine has been married to Chris since 2019 after dating for about a year. Last month, the couple celebrated their fourth wedding anniversary and they celebrated it by returning to the place where he proposed to her.

"Happy Anniversary!! Mom and dads first night away in three years. Back to the spot where we said 'I do!' Love you honey!" the "Guardians of the Galaxy Vol. 3" star captioned the snap on his Instagram page.

Sharing more pictures from their romantic getaway, Katherine posted on her own page, "Came back to the place where it all happened happy anniversary to my love angel face. I love life with you."