Kate Winslet's daughter is jealous that she got to kiss Liam Hemsworth.

Kate Winslet

Kate Winslet

Kate, 40 and 26-year-old Liam play lovers in new movie 'The Dressmaker' and Kate's 15-year-old daughter Mia Threapleton has a huge crush on the hunky star.

The star told PEOPLE: "Mia was just really jealous that I got to kiss Liam Hemsworth. She couldn't come [to the set] on the days that he was there. She was mortified."

Kate also insisted she had no idea how old Liam was when they were filming.

She said: "It didn't even occur to me. And the funny thing is now that the film is coming out, people are noticing that. I'm like, 'Oh yeah, I completely, honestly, until today, I didn't know how old Liam was.'

"I don't Google. I don't have any social media of any kind at all. He was just Liam Hemsworth playing Teddy. Because the characters were contemporaries when they were younger, to me that was all we were doing."

Liam was thrilled to work on the movie with Kate and revealed his top tips for kissing scenes.

He said: "I was very excited when I heard she was a part of the film, and that was a big attraction to do this.

"Woah! Those are always - I don't know, what do you do? Brush your teeth beforehand? That would be my only advice."

In 'The Dressmaker', Kate plays a woman who returns to Australia after years working in London in high fashion. Her alter-ego cares for her mother and falls in love with a local farmer, who is played by Liam.

And director Jocelyn Moorhouse was thrilled with the chemistry between the stars.

She said: "We didn't have much time to rehearse.

"Liam had come straight off of 'The Hunger Games'. We had one read-through the night before and then as soon as I saw him looking at her with those beautiful blue eyes of his and the way she looks back at him, I was thrilled. I knew, yeah, instant chemistry! These two are gorgeous together."

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