Olivia Wilde is joined by Billie Lourd at photocall for her directorial debut ...

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She has gone from working in front of the camera to stepping behind it for the first time for her feature film debut.

And Olivia Wilde looked nothing short of sensational as she was joined by Billie Lourd at a photocall for her film Booksmart in Los Angeles on Saturday.

The first-time director, 35, cut an elegant figure for the event where she donned a black blazer and matching trousers.

Pals: Olivia Wilde, 35, looked nothing short of sensational as she was joined by Billie Lourd, 27, at a photocall for her film Booksmart in Los Angeles on Saturday

Pals: Olivia Wilde, 35, looked nothing short of sensational as she was joined by Billie Lourd, 27, at a photocall for her film Booksmart in Los Angeles on Saturday 

Letting her blonde locks fall loose down her shoulders, Olivia completed her look for the day with several necklaces.

Billie Lourd, who plays Gigi in the coming-of-age film, looked stylish in a black long-sleeved dress with structured shoulders and a pleated hemline.

The actress, 27, cinched her waist with a black belt and added height to her frame with a pair of matching ankle boots. 

Kaitlyn Dever, who stars as Amy Anstler in the film, was also in attendance at the photocall where she donned a black leather jacket and a brown printed dress with a deep v-neckline.

Style: Olivia cut an elegant figure for the event where she donned a black blazer and matching trousers

Style: Olivia cut an elegant figure for the event where she donned a black blazer and matching trousers 

Fashion: Billie, who plays Gigi in the coming-of-age film, looked stylish in a black long-sleeved dress with structured shoulders and a pleated hemline

: Billie, who plays Gigi in the coming-of-age film, looked stylish in a black long-sleeved dress with structured shoulders and a pleated hemline 

Meanwhile, Nico Haraga, 21, who plays Tanner in the film, also joined his co-stars at the event and wore a white bomber jacket with blue jeans and a  blue cap.

Booksmart, which also stars Lisa Kudrow and Olivia's fiancé Jason Sudeikis, follows two teenage girls who decide to finally break the rules and party on their last day of classes.   

The event comes after Olivia was recently addressed by a Twitter user who complained about the cuts made to the comedy when it was shown on a Delta airlines flight. 

Radiant: Kaitlyn Dever, 22, who stars as Amy in the film, was also in attendance at the photocall where she donned a black leather jacket and a brown printed dress with a deep v-neckline

Radiant: Kaitlyn Dever, 22, who stars as Amy in the film, was also in attendance at the photocall where she donned a black leather jacket and a brown printed dress with a deep v-neckline 

Good time: Olivia and Billie gave each other a warm hug as they celebrated Olivia's directorial debut

Good time: Olivia and Billie gave each other a warm hug as they celebrated Olivia's directorial debut 

Glamour: Letting her blonde locks fall loose down her shoulders, Olivia completed her look for the day with several necklaces

Glamour: Letting her blonde locks fall loose down her shoulders, Olivia completed her look for the day with several necklaces 

The user noted that a romantic scene between Kaitlyn and actress Diana Silvers was omitted, while other similar embraces featuring male and female characters remained untouched.

'Tried watching Booksmart on the plane and they

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