Paris Hilton cradles her black Chihuahua Diamond while in Malibu with fiancé Carter Reum 

Paris Hilton cradles her adorable black Chihuahua Diamond in her arms while spending time in Malibu with her fiancé Carter Reum

She’s known for her revolving door of achingly adorable tiny dogs.

And Paris Hilton showed off one of her all-time cutest pooches on Saturday when she stepped out in Malibu with her minuscule black-and-brown Chihuahua Diamond perched in her arms.

The 40-year-old heiress and reality star rocked a casual sweatsuit while in the sunny California city with her fiancé Carter Reum in tow.

Fun in the sun: Paris Hilton, 40, held her adorable black and brown Chihuahua Diamond in her arms while spending some time in Malibu on Saturday with her fiancé Carter Reum

Paris highlighted her sporty age-defying figure in a gray–blue Crooks & Castles sweatshirt and matching sweatpants.

The outfit was covered in the brand’s busy logo, with its name printed across her chest. 

She wore a classic blue Los Angeles Dodgers baseball cap over her blond tresses, which were styled into a relaxed bob.

She kept the rest of her look sporty with black trainers and blocked out the sun with a chunky wraparound pair of Dolce & Gabbana sunglasses with the name printed above the lenses.

Workout chic: She looked sporty in a Crooks & Castles sweatsuit with a Dodgers cap and black Dolce & Gabbana sunglasses, while Carter wore a dark sweater with light jeans

Workout chic: She looked sporty in a Crooks & Castles sweatsuit with a Dodgers cap and black Dolce & Gabbana sunglasses, while Carter wore a dark sweater with light jeans

Paris gripped little Diamond tightly as he surveyed the scene.

She revealed she had purchased the fun-sized pup back in 2016, and he’s gone on to become on of her favorite among her pack of dogs.

She was joined by Carter, who had on a dark sweater with acid-wash jeans and aviator sunglasses.

The two were seen chatting with a friend while relaxing outdoors.

Loved-up: Paris and Carter have been together since 2019, and he proposed to her in February of this year during a tropical getaway with family

Loved-up: Paris and Carter have been together since 2019, and he proposed to her in February of this year during a tropical getaway with family 

Poolside beauty: Earlier on Saturday, Paris showed off her beach body in a sparkling blue mermaid tale and seashell bikini top on Instagram

Poolside beauty: Earlier on Saturday, Paris showed off her beach body in a sparkling blue mermaid tale and seashell bikini top on Instagram

Paris has seemed more ebullient than ever in recent years, possibly thanks to her relationship with her fiancé Carter.

The couple had known each other for more than 15 years prior to starting their relationship in 2019, though they wouldn’t go public until the following year.

The socialite was joined by her family in February of this year when the venture capitalist proposed to her during a tropical getaway.

Earlier on Saturday, Paris showed off her beach body in a sparkling blue mermaid tale and seashell bikini top on Instagram.

Mermaid: The look was part of a short Instagram video that seemed to be about sharing positive affirmations with her 14.5 million Instagram followers

Mermaid: The look was part of a short Instagram video that seemed to be about sharing positive affirmations with her 14.5 million Instagram followers

Positive affirmations: 'I inspire others by being my authentic self,' she said in a hypnotizing tone as the camera moved up her mermaid suit

Positive affirmations: ‘I inspire others by being my authentic self,’ she said in a hypnotizing tone as the camera moved up her mermaid suit

The look was part of a short Instagram video that seemed to be about sharing positive affirmations with her 14.5 million Instagram followers. 

‘I inspire others by being my authentic self,’ she said in a hypnotizing tone as the camera moved up her mermaid suit.

She flashed the same slogan across the screen, before popping back in to slap her tale against the pool surface.

‘Shine like the star you are ✨ The next time you doubt yourself, remember to say this #Sliving affirmation to replace that worry with self-love,’ she wrote, before sending her followers to her website for more ways to de-stress.

Staying positive: She flashed the same slogan across the screen, before popping back in to slap her tale against the pool surface

Staying positive: She flashed the same slogan across the screen, before popping back in to slap her tale against the pool surface

Great mood: 'Shine like the star you are ¿ The next time you doubt yourself, remember to say this #Sliving affirmation to replace that worry with self-love,' she wrote,' she captioned the video

Great mood: ‘Shine like the star you are ✨ The next time you doubt yourself, remember to say this #Sliving affirmation to replace that worry with self-love,’ she wrote,’ she captioned the video