Kim Kardashian West and Khloe Kardashian toned down their usually revealing outfits and opted for more demure fashion ensembles as they showed their support for The Promise Institute for Human Rights at UCLA on Tuesday.

The A-Listers perfected business chic as they enjoyed the evening for a special cause with close ties to their Armenian heritage.

Kim, 39, rocked a glamorous oversized suit jacket with wrap-around detailing and tailored trousers, while her sister Khloe, 35, opted for a classically feminine two-piece suit with a flattering neckline and smart, high-waisted trousers.

The wife of music icon Kanye West was a vision of business as she made a statement at the important event.

Kim Kardashian opted for a demure fashion ensemble as she showed her support for The Promise Institute for Human Rights (
Image:
Getty Images for UCLA)

Kim wore her raven looks in a sleek style and she accentuated her beauty with a glowing make-up look, while blonde bombshell Khloe wore her golden tresses in beachy waves and showed off a rose-tinted sheen on her face.

Kim posted a snap of a floral pin from the event to her Instagram story as she shared an insight to her Armenian heritage with her 152 million followers.

She captioned the snap: "The Promise Armenian Institute at UCLA being announced tonight!"

The flower pin Kim snapped was used as a symbol of the centennial of the Armenian genocide in 2015.

Khloe Kardashian, 35, opted for a classically feminine two-piece suit with a flattering neckline and smart, high-waisted trousers (
Image:
Getty Images for UCLA)

The center at the university's School of Law launched in 2017 with the help of a $20 million donation from the proceeds of the movie The Promise that is set during the Armenian Genocide in 1915.

Breaking Bad star Aaron Paul and The Promise stars Christian Bale, Agenla Sarafyan and director Terry George were among the high-profile stars that also attended the launch event.

The decision to contribute proceeds from the film was led by Dr. Eric Esrailian, film producer of The Promise and a member at UCLA.

The center launched with a $20 million donation from the movie The Promise that is set during the Armenian Genocide (
Image:
Getty Images for UCLA)

Just last month, reality queen Kim shared an insight into her embracing her Armenian heritage as she was baptised with children in her families ancestral country.

The Keeping Up With The Kardashians beauty took part in the Orthodox Christian ceremony, that welcomed her into the faith, alongside her children Saint, three, Chicago, 20 months, and four-month-old Psalm.

The reality TV personalities eldest child North, six, who was baptised in Jerusalem four years ago, was also in attendance alongside Kim's sister Kourtney and her children.

Just last month, Kim embraced her Armenian heritage as she was baptised with children in her families ancestral country (
Image:
Instagram)

Following the religious rite the star took to Instagram to share the news with a series of snaps, which she captioned: "Thank you Armenia for hosting my family and I on such a memorable trip.

"So blessed to have been baptized along with my babies at Mother See of Holy Etchmiadzin, Armenia's main cathedral which is sometimes referred to as the Vatican of the Armenian Apostolic Church. This church was built in 303 AD."

It comes after Kim also sat down for dinner with Armenian President Armen Sarkissian in October alongside her sister Kourtney Kardashian .