Kate Beckinsale, 47, stuns in a black and white bikini as she lounges in hammock alongside one of her felines in honor of International Cat Day

She regularly showcases her two beautiful cats, Willow and Clive, on her Instagram page.

And on Saturday the Underworld star gave her 4.3 million fans and followers an added bonus when she shared a photo of herself lounging alongside one of her feline family members in a bikini in honor of International Cat Day.

'Happy #internationalcatday,' she captioned the sultry snap that showcased her fabulous figure.

Feline family members: Kate Beckinsale, 47, put her fabulous figure on display in a black and white bikini as she lounged alongside her cat, Willow, in honor of International Cat Day

Feline family members: Kate Beckinsale, 47, put her fabulous figure on display in a black and white bikini as she lounged alongside her cat, Willow, in honor of International Cat Day

Beckinsale, 47, stunned as she laid back in a hammock, seemingly in the backyard of her home in Los Angeles, in the two-piece number that included white bottoms and a shoulderless black top.

She also wore strapped heels, dark sunglasses and pulled her long brown tresses into a ponytail

One of her two Persian cats, Willow, can be seen laying in front of her mama in a matching, mini version of the hammock.   

Great fodder: The Underworld actress has showcased her two Persian cats on social media

Great fodder: The Underworld actress has showcased her two Persian cats on social media

Entertaining: Beckinsale's older male cat, Clive, has also made for funny photos and videos

Entertaining: Beckinsale's older male cat, Clive, has also made for funny photos and videos

'I'm very much a cat person. I had cats growing up when I was little, and a big dog,' Beckinsale admitted to People.

'Cats are easier than dogs because you don't have to walk around with a bag of poo like you do with a dog, which I hate to walk around with a bag of poo.' 

The British-born actress says her two cats have completely different personalities and preferences, which from the looks of her posts makes for good fodder on social media.

She admits her female, Willow, is a 'handful' with her grumpy demeanor and animated expressions. But her funny noises and reactions get plenty of funny comments from followers.

Dancing the night away: The British-born star uploaded a fun clip of herself dancing with Clive in celebration of her 47th birthday in late July

Dancing the night away: The British-born star uploaded a fun clip of herself dancing with Clive in celebration of her 47th birthday in late July

Lovebirds: Beckinsale's 23-year-old boyfriend, Goody Grace, pronounced his love for his lady in her birthday post, which she reciprocated

Lovebirds: Beckinsale's 23-year-old boyfriend, Goody Grace, pronounced his love for his lady in her birthday post, which she reciprocated

In celebration of her 47th birthday in July, the Much Ado About Nothing star uploaded a fun clip of herself dancing with her male cat Clive. 

Her playful post got the attention of her 23-year-old boyfriend, Goody Grace, who took the opportunity to comment: 'HAPPY BIRTHDAY I LOVE YOU', to which she replied: 'I love you' alongside a kissing emoji.   

The couple only went public with their romance in April. 

Also known as World Cat Day, International Cat Day was created by the International Fund for Animal Welfare in 2002 as a way to raise awareness for cats and learn about ways to help and protect them.   

Movie star: Beckinsale made her film debut in 1993's Much Ado About Nothing, but she is best known to many fans for her role in the Underworld franchise; she's pictured in January 2020

Movie star: Beckinsale made her film debut in 1993's Much Ado About Nothing, but she is best known to many fans for her role in the Underworld franchise; she's pictured in January 2020