United Kingdom, Dec. 23 -- Sigourney Weaver has addressed "legitimate" concerns over her kissing scene with Jack Champion.

The pair appear together in Avatar: Fire and Ash and the 76-year-old actress' character Kiri shares a smooch with Jack's Spider, and because the movie was made when the 21-year-old star was around 15 years old, audiences have expressed concern over the moment.

However, Sigourney has revealed they actually shot the kiss separately.

She told The Hollywood Reporter: "That scene where I say, 'You're perfect just as you are', we had to be very delicate about that scene because it included a kiss. Obviously I wasn't going to kiss Jack, who was 14 or 15, in real life.

"We asked Jack to pick someone I could kiss and he di...