Sydney Sweeney and Amanda Seyfried "just clicked" while working on The Housemaid

The blonde beauty - who has enjoyed a meteoric rise in recent years - told Extra: "It's so much fun.

"It's been such a delight being able to just even promote it with Amanda. We have such a great time together, and being able to share this love for this film with all of the book lovers and people who are excited to see this has been just incredibly unique, and I'm really excited for people to see it."

Sydney admired Amanda for years before they actually worked together.

She said: "I was having a dream-come-true experience. I grew up loving Amanda. Of course, I love Mamma Mia, and we just clicked.

"We have very similar processes when we work. We love the same things. We have very similar personalities. So, it's kind of like meeting your big sister. I almost was like, 'Are we separated at birth? I really I feel like I'm connected to you.'"

Meanwhile, Sydney recently described herself as a "huge book reader".

The actress was particularly passionate about making The Housemaid because she'd previously read the book.

She told Entertainment Tonight: "I'm a huge book reader and so there were a couple different drafts, and I was like, 'Wait, wait, wait, where's this? Where's that? We have to keep this. We can't change that.' I'm very much for the book fans."

Sydney also explained her character's understated look in the movie.

The actress said: "That was actually one of my biggest things with the costume department.

"I did not want every single outfit, every single day to be different.

"She has her staple pair of jeans, one jacket, she picked up stuff from the thrift store. She's not going shopping and buying all these new products and pieces."