Chris Pratt believes "listening" is the key to a good relationship.

Katherine Schwarzenegger and Chris Pratt

Katherine Schwarzenegger and Chris Pratt

The 42-year-old actor celebrated two years of marriage to Katherine Schwarzenegger last month and he's shared the secrets as to what he believes keeps their relationship so strong.

He told 'Entertainment Tonight': "Communicate. Listen, listen to your partner with intention. Care about each other's feelings and support one another and just listen."

To mark their anniversary, Chris had shared a video of his wife giving him a pedicure but he was tight-lipped as to whether she'd worked on is nails for the Los Angeles premiere of his new movie 'The Tomorrow War' on Wednesday (30.06.21).

Asked at the event if Katherine had trimmed his nails, he said: "That is a secret…and they look amazing."

Chris - who has 10-month-old Lyla with Katherine and Jack, eight, with first wife Anna Faris - filmed the futuristic thriller in September 2019 and wrapped in January 2020 ahead of a December 2020 release date, but it was pushed back until now due to the coronavirus pandemic.

And the actor - who plays teacher and veteran Dan Forester, who is drafted into a war that hasn't happened yet - explained he was keen to sign up for "one really big movie" at the time, and liked the fact it was an original story.

He said:"It was important for me to do one really big movie that year, and this was the one.

"It's original, which is something that I feel like there have been a lot of cravings for something that isn't based on a sequel or comic book or something. It's like a big movie that's original. So this script came along and it was great so we made it!

"We definitely took tonal notes from 'Independence Day', it's something that's a great movie and a movie that came up in the process of really honing this script for tone. I love that movie. It's got equal parts comedy, heart, action,

"I think we're better. I think we did it better. I really do. I think our alien is scary. Make sure you go to the bathroom before you sit down and watch the movie, and also make sure to turn your phone off."

And Chris is hopeful he did well in his additional role as executive producer on the film, noting the position is a part of a "group effort".

He added: "It takes a village no matter what the titles are, it's a really collaborative art form making a big movie like this," he expressed. "It's not that dissimilar to having starred in other movies, I guess I just come on a little earlier. I get to give a creative input. I think I did pretty well."