“If I could create the perfect dream little sister, it’s her,” the actress told PEOPLE of her sister-in-law at the premiere of her new film ‘Lola’

Harper Beckham and Nicola Peltz Beckham. PHOTO: NICOLA PELTZ BECKHAM/INSTAGRAM

Nicola Peltz Beckham and Harper Beckham are two peas in a pod!

At the premiere of Nicola’s directorial debut Lola on Saturday, the actress and model, 29, reflected on her relationship with husband Brooklyn Beckham’s younger sister.

When asked about whether her real-life bond with Harper, 12, inspired the sibling bond found in her new film, Nicola told PEOPLE that the preteen “is my dream little sister.”

“If I could create the perfect dream little sister, it’s her,” she added. “I’m so blessed I get to have her as my little sister in my life.”

Harper Beckham and Nicola Peltz Beckham.NICOLA PELTZ BECKHAM/INSTAGRAM

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Nicola also told PEOPLE at the Regency Bruin Theatre that her character’s brother Arlo, played by Luke David Blumm, is “based off” her godson, who also attended the Saturday premiere.

“I took a lot of inspiration from him, from our relationship,” she said.

“And yeah, I tried to capture the love and the light of these people,” Nicola added. “And obviously, some characters are made up, but I hope when people watch that they feel that.”

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While Harper wasn’t at the premiere, Nicola’s husband Brooklyn, 24, and some other Beckham family members were.

On the red carpet, the couple posed for photos with Cruz and Victoria Beckham, and Nicola praised her mother-in-law for designing her premiere outfit — a custom corset and trouser set from Victoria’s synonymous brand.

“She is a genius,” the actress told PEOPLE of the fashion designer, 49. “I am so honored to be able to wear this tonight. I feel so business, but sexy, and she’s a genius.”

Brooklyn Peltz Beckham and Nicola Peltz Beckham.FRAZER HARRISON/GETTY

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Nicola has never shied away from showing off her close relationship with the Beckham family, including her sisterly bond with the youngest child.

Last October, the model and filmmaker shared a photo of her and Harper posing backstage at Victoria’s Paris Fashion Week show. “Such a beautiful show with my baby sis 🤍🤍🤍 congratulations @victoriabeckham,” Nicola wrote in her caption.

Later in December, the pair shared another cute moment together, dancing to Coi Leray’s “TWINNEM” in a TikTok together.

In the adorable “twinning” video, the sisters-in-law jump around in matching pink outfits and put on makeup while lip-syncing to the track together.

“Twinning with baby sis 🩷🩷,” Nicola captioned the clip.