Big Brother: Katie Williams’ night out with co-stars Tilly and Sarah Jane

Big Brother’s Katie Williams enjoys a night out with co-stars Tilly Whitfield and Sarah Jane Adams in Bondi

Big Brother Australia returned to screens for its thirteenth season on Monday.

And it appears Katie Williams, Tilly Whitfield and Sarah Jane Adams may form an alliance during their time on the show, after they stepped out together in Sydney.

The three housemates, who all hail from New South Wales, were spotted leaving Public Bar in Bondi last week.

Catch up: Big Brother’s Katie Williams (left) enjoyed a night out with her co-stars Tilly Whitfield (centre) and Sarah Jane Adams (right) at Bondi’s Public Bar last week

Katie, 27, showed off her sensational figure in a beige utility dress featuring a collar and plunging neckline, which she accessorised with gold necklaces.

The former Australian Ninja Warrior participant carried a $1,600 black Prada purse and teamed her look with red mule heels for a pop of colour.

She beamed alongside her co-star Tilly, 21, who entered the house during Tuesday night’s episode.

Reunited: It appears Katie, Tilly and Sarah Jane may form an alliance during their time on the show, after they stepped out together in Sydney

Reunited: It appears Katie, Tilly and Sarah Jane may form an alliance during their time on the show, after they stepped out together in Sydney

Alliance? The three housemates, who all hail from New South Wales, were spotted leaving Public Bar in Bondi last week

Alliance? The three housemates, who all hail from New South Wales, were spotted leaving Public Bar in Bondi last week

Stylish: Katie, 27, showed off her sensational figure in a beige utility dress featuring a collar and plunging neckline, which she accessorised with gold necklaces

Stylish: Katie, 27, showed off her sensational figure in a beige utility dress featuring a collar and plunging neckline, which she accessorised with gold necklaces

Expensive taste: The former Australian Ninja Warrior participant carried a $1,600 black Prada purse and teamed her look with red mule heels for a pop of colour

Expensive taste: The former Australian Ninja Warrior participant carried a $1,600 black Prada purse and teamed her look with red mule heels for a pop of colour 

Friends: She was joined by her Big Brother co-star Tilly, 21, who entered the house during Tuesday night's episode

Pals: She was joined by co-star Tilly (right) who entered the house on Tuesday night’s episode

Tilly opted for a bright and eye-catching ensemble: a neon orange and bright pink top teamed with high-waisted flared jeans. 

The blonde bombshell, who hails from the Northern Beaches, styled her luscious tresses in waves that cascaded down her shoulders. 

They were joined by fellow housemate Sarah Jane Adams.

Fashionista: Tilly opted for a bright and eye-catching ensemble: a neon orange and bright pink top teamed with high-waisted flared jeans

Stylish: The blonde bombshell, who hails from the Northern Beaches, styled her luscious tresses in waves that cascaded down her shoulders

Fashionista: Tilly opted for a bright and eye-catching ensemble: a neon orange and bright pink top teamed with high-waisted flared jeans 

Company: The younger women were joined by fellow housemate Sarah Jane Adams (right)

Company: The younger women were joined by fellow housemate Sarah Jane Adams (right)

Casual: The group was seen chatting  as they made their way to a waiting Uber

Casual: The group was seen chatting  as they made their way to a waiting Uber 

Is everything okay? At one stage Tilly appeared tense when she couldn't find her ride home

Is everything okay? At one stage Tilly appeared tense when she couldn’t find her ride home

Sarah Jane, 66, dressed for the outing in a camouflage-print crop jacket with khaki cargo pants and red combat boots. 

The artist styled her silver tresses up in her signature bun style.

The trio were seen having a tense conversation at their table, and at one stage even held each other’s hands.

They are among 20 new housemates competing for the $250,000 cash prize, in a season that promises ‘new rules and massive twists in a house full of secrets’.

Big Brother continues Wednesday at 7.30pm on Seven

Trademark outfit: Sarah Jane, 66, dressed for the outing in a camouflage print crop jacket with khaki green cargo pants and red combat boots

Trademark outfit: Sarah Jane, 66, dressed for the outing in a camouflage print crop jacket with khaki green cargo pants and red combat boots

Stylish: The artist styled her silver tresses up in her signature bun-style

Stylish: The artist styled her silver tresses up in her signature bun-style

Tense: At the table, the trio were seen having a tense conversation, and at one stage were seen holding each other's hands

Tense: At the table, the trio were seen having a tense conversation, and at one stage were seen holding each other’s hands

Head-to-head: They are among 20 new housemates competing for the $250,000 cash prize, in a season that promises 'new rules and massive twists in a house full of secrets'

Head-to-head: They are among 20 new housemates competing for the $250,000 cash prize, in a season that promises ‘new rules and massive twists in a house full of secrets’