The teen is currently enjoying a vacation in Hawaii with Denise and on Tuesday, she took to Instagram with a stunning photo of herself in front of a waterfall.
Sami wore a lilac, metallic bikini and ran her fingers through her long blonde locks.
WATCH: Denise Richards' daughter says she looks 'so pretty' in breathtaking video
She looked just like her famous mom and fans commented on her appearance and her tropical surroundings as they added on-fire emojis and wrote: "Absolutely beautiful."
Denise has posed in her fair share of swimsuits over the years as she carved out a three-decade career as a model and actress in movies like Wild Things, Drop Dead Gorgeous, and The World Is Not Enough.
Sami showed off her modeling skills while on vacation with her mom
Last year, both Denise and Sami joined OnlyFans and the former Real Housewives star defended her daughter after receiving negative comments: "I wish I had the confidence my 18 yr old daughter has," she said in a social media message. "And I also can't be judgmental of her choices. I did Wild Things & Playboy."
The Starship Troopers star is close with her three daughters, Sami, Lola, 17 - who she shares with Charlie Sheen - as well as her youngest, Eloise, 11, who she adopted in 2011.
Denise and her daughter both joined OnlyFans last year
When Denise rang in her 52nd birthday last week, Sami was one of the first to share a heartfelt message.
She posted a photo of the pair looking so similar as they posed in green gowns.
Sami captioned the Instagram post: "Happy birthday mom I love you so much. Thank you for always being my biggest supporter."
Sami later added another sunset swimsuit photo from her vacation
The post comes after Sami returned home to live with Denise after their separation last year, which saw the eldest daughter move in with her father Charlie.
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