Nicole Richie and Emma Roberts are a chic duo at star-studded Didion & Babitz book launch in Hollywood

Nicole Richie put on a chic display alongside Emma Roberts as they attended the star-studded Didion & Babitz book launch event in West Hollywood on Tuesday.

The TV personality, 43 - who made a rare appearance with her younger sister Sofia Richie at the Baby2Baby gala - crossed paths with the Scream Queens star, 33, at the Chateau Marmont where the festivities took place.

The book - which was written by Lili Anolik - was published on November 12 and looks closely at the lives of both Eve Babitz and Joan Didion.

Celebrities gathered together to celebrate the novel's release, including Richie who turned heads wearing a colorful, floral print dress that clung to her frame.

The ensemble was held up with halter-styled straps and contained off-the-shoulder sleeves that draped down.

Nicole's locks were parted in the middle, and effortlessly flowed down in light waves past her shoulders.

She accessorized the look with a pair of dangly earrings to coordinate with the colors of her dress and also added a variety of flashy rings.

The star's makeup was classically done for the evening, and comprised of a layer of mascara to her voluminous lashes as well as a light shadow around her eyes.

A warm blush was added for a radiant glow, while a nude-colored, glossy tint was worn on her lips for a finishing touch.

Richie was seen pausing for a few photos as she mingled with other guests at the event, and was also spotted speaking to the crowd.

At one point, the Simple Life star held a black folder in her hands as she seemingly read excerpts from Anolik's new book.

The novel delves into the dynamic between both Eve Babitz and Joan Didion, as well as their varying relationships with Hollywood, per Deadline .

Babitz was a visual artist and author known for writing Eve's Hollywood (1974) while Didion was a journalist who was called one of the 'pioneers of New Journalism.'

Emma Roberts was also in attendance on Tuesday, and was seen crossing paths with Nicole inside the venue.

The American Horror Story actress showed off her sense of style wearing a short-sleeved, white shirt and a silver bralette on top.

She slipped into a matching, high-waisted skirt and also slipped into a pair of open-toed, gray pumps.

Her blonde hair was parted in the middle, and cascaded down past her shoulders in elegant waves.

Roberts easily carried a black clutch bag in her hand to hold a few items she needed during the special night.

Emma's makeup was glammed up, and comprised of a layer of mascara to her lashes as well as a light smoky shadow around her eyes.

A warm blush was added to better accentuate her cheekbones, while a nude-colored, matte tint was worn on her lips.

The star was later seen standing in front of a microphone as she read through papers inside the folder.

Along with spending time with Richie, Emma was also seen mingling with Dustin Lance who donned a pair of khaki pants as well as a blue and white-striped sweater.

She also flashed a cheerful smile with Jake Wesley Rodgers who opted for a black and white-patterned sweater and a pair of black trousers.

Elizabeth Olsen was fashionable in a black skirt as well as white blouse and black shirt underneath.

The WandaVision actress layered the ensemble with a dark green blazer and also wore a pair of chunky, black boots.

The star's brunette locks were parted in the middle, and effortlessly flowed down in light waves past her shoulders.

Beverly D'Angelo was spotted wearing a black shirt that had the words 'What the f*** is really going on?' printed in white lettering on the front.

The National Lampoon's Vacation star wore a pair of black trousers as well as a white coat for a final touch.

D'Angelo opted to not wear any flashy pieces of jewelry to allow her outfit to be the main focal point.

She was seen posing with Emma Roberts and Elizabeth Olsen as they crossed paths with each other during the night.

Roberts and Beverly also paused for additional pictures together as they helped celebrate the launch of Didion & Babitz.

The Violent Night actress was later spotted with Barbara Steel who was classy in a white blouse which was tucked into a black, pleated leather skirt.

Karah Preiss was stylishly casual wearing a white button that was partially unfastened around the collar.

The executive producer slipped into a pair of loose-fitting, black trousers as well as a pair of brown shoes.

She was seen pausing for a memorable snap with Roberts as well as the author of Didion & Babitz, Lili Anolik.

Emma held a smile on her face as both she and Anolik held a lighthearted conversation during the festivities.

Da'Vine Joy Randolph was also in attendance, and wowed wearing a dark red, satin jumpsuit.

The Holdovers actress's brunette hair was parted in the middle, and flowed down past her shoulders in elegant curls.

Like many of the guests, the Oscar winner was also seen reading from the binder as other guests watched in the distance.

Mirandi Babitz - the younger sister of the late Eve Babitz who passed away in 2021 - also stopped by the book launch.

She flashed a cheerful smile wearing a long-sleeved, blue shirt as well as a pair of black pants and closed-toed, red shoes.

Before the event came to an end on Tuesday, the celebrity attendees stopped to take group photos together.

At one point, Emma Roberts, Beverly D'Angelo, Elizabeth Olsen, Lili Anolik, Nicole Richie and Alexi Wasser posed for the camera.