Natalie Portman's films are "usually not appropriate" for her children

The 43-year-old film star - who has son Aleph, 13, and daughter Amalia, eight, with ex-husband Benjamin Millepied - told 'Extra': "They have not seen it yet and I can't wait to show it to them because A, I like never get to show my kids my movies because they're usually not appropriate, and then B, it's so fun.

"I think they're gonna have the best time watching it."

Natalie also relished the experience of working alongside John, describing him as a "great actor".

The celebrity duo have actually known each other since they were children, and Natalie loved being reunited with her showbiz pal.

She said: "I get John Krasinski as my brother, who's, like, the greatest and so funny and such a great actor.

"I think it's so fun to have a brother-sister relationship at the centre of the film. I think it's quite unusual in this kind of adventure and makes sense for 'Fountain of Youth' to be with someone that has known you since you're a child."

Natalie recently premiered 'Arco' - the Ugo Bienvenu-directed animation movie - at the Cannes FIim Festival, and the actress feels excited to have so many different projects being released at the same time.

The Hollywood star said: "It's been incredible to have so many things I care about kind of emerge in the world at the same time.

"To have 'Arco', a film we produced, which is animated, first feature by Ugo Bienvenu, and we're so, so proud of it, and it debuted to such love and appreciation, so it was an incredible moment."

Meanwhile, Natalie previously admitted that she's making a conscious effort to "impress" her children with her career choices.

The actress - who previously starred as Jane Foster in the Marvel Cinematic Universe - told Variety in 2022: "I feel like it's the phase of my career where I'm really trying to just impress my kids."