The Game of Thrones star, Maisie Williams, describes her first onscreen sex scene as “awkward.”

The 18-year-old star is trying to do a more mature role with her newest indie film The Falling. But despite being part of the hit series Game of Thrones, the actress felt rather self-conscious, she told Vulture.

.@Maisie_Williams reveals why filming her first sex scene was super awkward http://t.co/KVLwbiWAvJ pic.twitter.com/1MRaSuN1Y3

— WhoSay (@WhoSay) August 17, 2015

The Falling is about Lydia, an English all-girls school student. The story tackles sexual awakening among young women in a very repressive surrounding set in the 1960s.

She revealed in an interview that her co-star, Joe Cole, helped her a lot to make her feel comfortable during their intimate scene.

The actress said, “Joe was very sensitive to the fact that I had never done a scene like this before, and it was great to work with someone who was so considerate of that.”

To make sure that the scene would go smoothly, Williams and Cole spent time together to get to know each other. The actress revealed they went out for lunches and rehearsed together so as to learn more about their characters.

When asked about her co-stars, Williams told Vulture she thought Maxine Peake hated her. She was relieved when she was told that Peake, who plays Lydia’s estranged mother, was instructed by the director to not get close to her.

The technique seemed to work on the actress because she admitted she was affected by Peake’s cold treatment. Williams confessed, “it felt like everyone was ignoring me and being really mean. It made me feel really sad and secluded and alone.”

Williams said she was happy to be able to form a good relationship with the other girls in the film. She said she had a great time bonding and learning with them during the filming.

The Falling is now showing in select theaters.