The Australian-born sisters were in high spirits as they posed for the cameras, with open mouth smiles and each with an arm wrapped around her sister's waist.
Kylie wore a show-stopping rubber William Wilde dress decorated with a large black and white bow. She matched the eye-catching outfit with a pair of stiletto heels with transparent toes and dazzing drop earrings.
The 45-year-old’s make-up was natural with subtle pink lips while her hair was worn in loose waves.
Dannii also went for an LBD – hers was designed by J'Aton Couture and featured off the shoulder detail and am embroidered skirt – which she teamed with a pair of sparkly heels.
A belt cinched in at the waist showed off the 42-year-old’s slender silhouette.
The former X Factor judge added a splash of colour with smokey eyes and bright red lipstick. She swept her dark locks into a relaxed chic chignon and painted her nails a striking red to match her lips.
Speaking on the BRITS red carpet on Wednesday evening the songstress revealed that she won’t be returning to the X Factor judging panel this year.
"Definitely not coming back to the X Factor UK this year… but never say never [in the future]," said the stunning brunette.
She went on to praise her big sister for her work on The Voice UK, saying: "I'm just in the spectator seat. I’m just at home watching my sister on The Voice ripping it up.
"It's nice to arrive seeing so many great comments, I’m Kylie to win, team Kylie!"